ADAPT 660 | ADAPT 661
Over-ear Bluetooth® headset with ANC

User Guide

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Contents

Contents
The ADAPT 660 headset.......................................................................................................................................................................................2
Package contents........................................................................................................................................................................................................3
Product overview.........................................................................................................................................................................................................4
Overview of the headset........................................................................................................................................................................................................................................4
Overview of the dongle...........................................................................................................................................................................................................................................7
Overview of the icons................................................................................................................................................................................................................................................7

Getting started..............................................................................................................................................................................................................8
Pairing the headset with Bluetooth® devices........................................................................................................................................................................................8
Using the audio cable............................................................................................................................................................................................................................................10
Using the USB cable................................................................................................................................................................................................................................................10
Installing the EPOS Connect app..................................................................................................................................................................................................................11
Installing the EPOS Connect software.......................................................................................................................................................................................................11
Changing Audio settings for the headset – Microsoft® Windows......................................................................................................................................11

Using the headset.....................................................................................................................................................................................................12
Turning the headset on and connecting it............................................................................................................................................................................................12
Turning Bluetooth on / off...................................................................................................................................................................................................................................12
Turning the headset off..........................................................................................................................................................................................................................................12
Adjusting and wearing the headset.............................................................................................................................................................................................................13
Adjusting the volume...............................................................................................................................................................................................................................................13
Adjusting the headset’s microphone volume for softphones................................................................................................................................................13
Muting the microphone.........................................................................................................................................................................................................................................14
Using Active Noise Cancellation (ANC)....................................................................................................................................................................................................14
Turning TalkThrough on / off............................................................................................................................................................................................................................. 15

Making calls using the headset ......................................................................................................................................................................16
Making a call................................................................................................................................................................................................................................................................... 16
Accepting / rejecting / ending a call........................................................................................................................................................................................................ 16
Redialing ............................................................................................................................................................................................................................................................................17
Using the voice assistant / Alexa / voice dial.....................................................................................................................................................................................18
Managing multiple calls......................................................................................................................................................................................................................................... 19

Using headset and dongle with Microsoft® Teams / Cortana................................................................................................. 20
Invoking Microsoft® Teams and check notifications....................................................................................................................................................................20
Activating and using Microsoft® Cortana..............................................................................................................................................................................................20

Listening to audio using the headset..........................................................................................................................................................21
Additional functions................................................................................................................................................................................................22
Charging the headset battery........................................................................................................................................................................................................................ 22
Verifying remaining battery power.............................................................................................................................................................................................................. 23
Activating / deactivating the Smart Pause function................................................................................................................................................................... 23
Changing the sound effect................................................................................................................................................................................................................................24
Activating / deactivating Call Enhancement.......................................................................................................................................................................................24
Adjusting the Sidetone..........................................................................................................................................................................................................................................24
Enabling / disabling voice prompts, tones and changing language.............................................................................................................................. 25
Reconnecting / disconnecting Bluetooth via the dongle...................................................................................................................................................... 25
If you leave the Bluetooth range.................................................................................................................................................................................................................. 26
Storing and transporting the headset..................................................................................................................................................................................................... 26

Maintaining the products and updating the firmware.................................................................................................................... 27
Cleaning the products...........................................................................................................................................................................................................................................27
Replacing the ear pads.........................................................................................................................................................................................................................................27
Updating the firmware of the products.................................................................................................................................................................................................. 28
Replacing / removing the headset‘s rechargeable battery................................................................................................................................................... 28

If a problem occurs ................................................................................................................................................................................................29
Clearing the pairing list of the headset (Reset)............................................................................................................................................................................. 30
Clearing the pairing list of the dongle (Reset)................................................................................................................................................................................ 30
ADAPT 66x Bluetooth® headset

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The ADAPT 660 headset

The ADAPT 660 headset
Maximize focus and productivity anywhere with theultimate headset powered by EPOS AI™ for crystal
clear calls, adaptive ANC and superior stereo sound.
Enjoy a unique UC optimized solution with machinelearning enhanced microphone performance.
Adaptive ANC helps you regain concentration bymonitoring your working environment and adjusts
noise reduction accordingly; even reducing windnoise when outdoors.
Get straight into collaborative work via a dedicatedbutton that launches Microsoft Teams on your PC
via the dongle included. Stay organized with Alexavoice assistant and connect simultaneously to mobile
and PC.
Whether revitalizing your open office, working
on-the-go, or enjoying a relaxed commute withsuperior stereo sound, ADAPT 600 boosts efficiency
and improves wellbeing; an essential audio tool fortoday’s mobile workforce.

Key benefits & features
Superb call clarity powered by EPOS AI™
Machine learning developed algorithms optimize
voice pick up, for a natural listening experiencefrom three advanced microphones
Regain concentration anytime, anywhere
Four adaptive ANC microphone system monitors
your working environment and adjusts noise
reduction in open offices, while reducing windnoise outdoors
Get organized with Alexa
Tap and hold to activate Alexa and stay on top ofyour day-to-day business. Never miss a meetingand plan your schedule both in and out of theofficeEnsure clear calls with UC certified solution
Certified for Microsoft Teams and optimized for UC
Experience superior sound to increase your focus
Renowned stereo sound and a personalized audio
profile means you can enjoy high-quality music tohelp your focus on work§

For safety instructions, consult the Safety Guide.

For specifications, consult the Fact sheet available at eposaudio.com

A list of accessories can be found on the product page at eposaudio.com

Trademarks
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by DSEA A/S is under license.
Qualcomm aptX is a product of Qualcomm Technologies International, Ltd. Qualcomm is a trademark of Qualcomm Incorporated, registered in the United States andother countries, used with permission. aptX is a trademark of Qualcomm Technologies International, Ltd., registered in the United States and other countries, usedwith permission.
All other trademarks are the property of their respective owners.

ADAPT 66x Bluetooth® headset

3Package contents

Package contents
ADAPT 660

ADAPT 661

Bluetooth headset +Bluetooth dongle BTD 800 (USB-A)

Bluetooth headset +Bluetooth dongle BTD 800 (USB-C)

OR

Case

USB cablewith USB-A and micro-USB plugorwith USB-C® to micro-USB plug

Audio cablewith 2.5 mm and 3.5 mm jack plug

Quick Guideon the box

Safety Guide
Compliance sheet

ADAPT 66x Bluetooth® headset

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Product overview

Product overview
Overview of the headset
HeadbandBluetooth switch
ANC switch
Teams/Pairing button
LEDs

Microphone

Audio socket
USB socket
ANC Microphones
Touch pad

Overview of the headset LED indications• Headset connected• Headset turned off

3x• Headset turns on• Bluetooth device found• Incoming call

3x

• Headset turns off• Headset disconnected from mobile device/dongle• Incoming call (rechargeable battery is weak)
Headset in pairing mode:
searching for mobile device/dongle
Rechargeable battery is weak
Battery power between 2 and 20%
Battery power between 21 and 40%
Battery power between 41 and 60%
Battery power between 61 and 80%
Battery power between 81 and 100%*Once the headset is successfully connected, the LED goes off.

ADAPT 66x Bluetooth® headset

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Product overview

Overview of the headset controls
Ear cups

Page
Turns the headset on

Turns the headset off

12

Touch pad

Tap

2x

1s

2s
4s
Swipe

FunctionPage

Accepts a call16

2 calls: Answers incoming & ends active call

19

Starts / pauses media playback

21

Turns TalkThrough on/off (ANC turned on)

15

Puts an active call on hold (pause) / unholds call16

2 calls: Answers incoming & puts active on hold19

2 calls: Toggles between two calls

19

Rejects a call

17

Ends a call16

2 calls: Ends active & unholds paused call

19

Activates voice assistant
Activates Alexa

18

Requests remaining battery power

23

FunctionPage

Mutes the microphone14• Skips to the previous track• Swipe and hold: Rewinds the track*21

Unmutes the microphone

14

Swipe and hold: Redials the last number

17• Skips to the next track• Swipe and hold: Fast-forwards the track*21

Increases the volume
13
Decreases the volume* These functions are not supported by all connected Bluetooth devices.

ADAPT 66x Bluetooth® headset

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Product overview

Bluetooth switch

Press

Function

Page

Turns Bluetooth on
12
Turns Bluetooth off

Teams/Pairing button

Press

Function

Page

Initiates a call

16

Invokes Microsoft Teams

20

Cancels pairing (Pairing mode)8

2x

Launches EPOS Connect app*

11

1s

Activates Cortana

18

Pairs the headset with a Bluetooth device

8

Clears pairing list (Pairing mode)

30

Function

Page

4s* These functions are not supported by all connected Bluetooth devices.

ANC switch

Press

Turns ANC Maximum mode on
Turns ANC Adaptive mode on;
adjustable via the EPOS Connect app
Turns ANC off

ADAPT 66x Bluetooth® headset

14

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Product overview

Overview of the dongle
BTD 800(USB-A)BTD 800(USB-C)

Link LED

Link LED

Link button
Link button

USB-C plug

USB-A plug

Overview of the dongle LED indications
3x
3x

3x 3x
3x 3x
3x 3x
3x 3x
3x
3x
3x
3x 3x
3x
3x
3x 3x

Dongle in pairing mode:
searching for headset
Pairing successful
Pairing failed
Dongle tries to connect to a Bluetooth device
Dongle and Bluetooth device connected
Incoming call
• Outgoing/active call
• Media playback

3x

Connected to Teams• Teams notification• Connecting to Teams or Invoking Cortana
Microphone of the connected Bluetooth device is muted

Overview of the dongle button
Link button

Press

Function

3s

Pairs the dongle with the headset

8

Reconnects the headset

25

Disconnects the headset

25

2x

Page

Overview of the icons
Tap the button

Notes: Good to know

2x

Press the button twice

LED indications

3s

Press and hold the button

Voice prompt is announced

ADAPT 66x Bluetooth® headset

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Getting started

Getting started
Pairing the headset with Bluetooth® devices
CAUTION

Danger of malfunction!
The transmitted radio waves of mobile devices can impair the operation of sensitive and unprotected devices.
> Only use Bluetooth where it is permitted.

The headset complies with the Bluetooth 5.0 standard. Bluetooth devices need to support the “Hands-Free Profile”(HFP), the “Headset Profile” (HSP), “Audio Video Remote Control Profile” (AVRCP) or the “Advanced Audio Distribution
Profile” (A2DP).
To transmit data via Bluetooth, you first have to pair yourheadset to a wireless device. The delivered dongle isalready paired with the headset.
The headset can save up to eight paired devices. If you
pair the headset with a ninth device, the device with theoldest activity in the pairing list will be overwritten. If you
want to re-establish a connection with this device, youhave to pair it again.
The headset can be connected to two of the paired
devices at the same time. You can only connect anotherdevice by disconnecting one of the already connected
devices.

Connecting the headset via the dongle
To connect the headset wirelessly with a computer, use the
BTD 800 dongle (USB-A or USB-C).
The dongle and the headset in the bundles are alreadypaired.
USB-C> Turn the headset on (see page 12).
> Plug the dongle into the USB port of your computer.

USB-A

The dongle LED flashes blue while searching and switches
to dimmed blue when connected successfully to theheadset.

If Microsoft Teams is invoked: The dongle connects to
Teams and lights up purple instead of blue.

The dongle shows Teams notifications (see page 20).

To manually pair the headset and the dongle, activate the pairing mode for both:> Press and hold the headset’s Teams/Pairing button and the dongle’s button until the LEDs alternately flashes
blue and red. Once the dongle and the headset are connected, the dongle lights up dimmed blue.

ADAPT 66x Bluetooth® headset

9Getting started

Pairing the headset via Bluetooth with a mobile device

1

2

3x
> Twist the ear cups to turn on the headset.

> Switch to position "I" to activate Bluetooth.

3

4

4s

> Press and hold the Teams/Pairing button until the LEDs

> Enable Bluetooth on your mobile device and start thelights up white one after the other.
The headset is in pairing mode.

search for Bluetooth devices – see instruction manual ofyour mobile device.

5

6< 20 cm...
...
EPOS ADAPT 660...

3x> Select “EPOS ADAPT 660” to establish a Bluetoothconnection to the headset.
To cancel pairing:> Press the Teams/Pairing button.

ADAPT 66x Bluetooth® headset

One LED flashes 3 times white as soon as the headset
finds a device to connect to. The LEDs turn off.

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Getting started

Using the audio cable
Use the audio cable for media playback when the battery is low or when Bluetooth transmission is restricted or notallowed. Bluetooth immediately turns off once the audio cable is connected to the headset.
> Insert the small jack plug into the audio socket of theheadset.
Bluetooth is deactivated.
> Connect the 3.5 mm jack plug to the audio output ofyour mobile device.
To disconnect the audio cable:> Pull the plug out of the headset and your mobile device.

The headset automatically tries to connect to available
paired Bluetooth devices.

You can use the Active Noise Cancellation (ANC) as usual (see page 14).

Using the USB cable
Use the USB cable for calls via softphone or media playback via USB and charging.

EPOS ADAPT 660> Connect the supplied USB cable to the USB socket of the headset and a USB socket of your computer.

The battery is being charged – see page 22.
> Click the Audio icon on your PC and select EPOS ADAPT 660.

ADAPT 66x Bluetooth® headset

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Getting started

Installing the EPOS Connect app
The free EPOS Connect app allows you to configure andupdate your headset and offers additional settings.
> Open the App Store or Google Play app on your mobile

device.
> Search for "EPOS Connect".
> Download and install the app.

EPOS
Connect

Installing the EPOS Connect software
The free EPOS Connect software allows you to configure
and update your headset and offers additional settings.
EPOS Connect> Download the software from eposaudio.com/connect.

EPOS Connectx> Install the software.

You need administrator rights on your computer – ifnecessary, contact your IT department.
To make calls via the computer:> Install a softphone (VoIP Software) or ask your admin forsupport.

eposaudio.com/connect

Changing Audio settings for the headset – Microsoft® Windows
Windows usually changes the Audio settings automatically
if you connect a new headset.
Audio settingsx

If the headset is connected but you hear no sound:

ADAPT> Right-click the Audio icon.

ADAPT> Select under output ADAPT 660 as speaker.
> Select under input ADAPT 660 as microphone.

ADAPT 66x Bluetooth® headset

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Using the headset

Using the headset
CAUTION

Hearing damage due to high volumes!
Listening at high volume levels for long periods can lead to permanent hearing defects.
> Set the volume to a low level before putting on the headset.
> Do not continuously expose yourself to high volumes.

Turning the headset on and connecting it

3x
3x> Twist the ear cups to turn on the headset.

One LED flashes 3 times white. The headset automaticallytries to connect to available paired Bluetooth devices.

One LED flashes 3 times white as soon as the headset
finds a device to connect to. The LEDs turn off.

Turning Bluetooth on / off> Turn Bluetooth on if you want to use the headset wireless.

Turns Bluetooth on

Turns Bluetooth off

Turning the headset off> Twist the ear cups to turn off the headset.

One LED flashes 3 times red. All volume settings are
saved automatically when the headset is turned off.
> Charge the headset (see page 22).

OR
> Store the headset (see page 25).

3x

ADAPT 66x Bluetooth® headset

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Using the headset

Adjusting and wearing the headset
For good sound quality and best possible wearing comfort, adjust the headset.

LR> Put the headset on so that the headband runs over the

top of your head and the side with the R marking restson your right ear.

> Adjust the headset so that• your ears are comfortably covered by the ear pads,• you feel even, gentle pressure around your ears,• a snug fit of the headband on the head is ensured.

Adjusting the volume
You can adjust three independent volume settings for theheadset:1. Call volume: during an active call
2. Audio volume: during audio streaming
3. Volume for ring tone, tones and voice prompts:
in idle mode – no active call or audio streaming

1
2
3> Swipe up or down to increase or decrease the volume.

Depending on the length of the swipe, you can adjust
the volume in smaller steps (short swipe) or in larger
steps (long swipe).
You hear a double beep when the minimum or maximum
is reached and louder or lower beeps for tones andvoice prompts.
To protect your hearing when you switch the headset
back on, very high volume levels are reset to a moderatelevel when switching off.
Alternatively you can adjust the volume on yourconnected device.

Adjusting the headset’s microphone volume for softphones> Initiate a call on your connected device to someone

Softphone

ADAPT 66x Bluetooth® headsetx

who will help you find the correct volume setting for yourmicrophone.
> Change the microphone volume in your softphone
application and/or in your PC audio application.

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Using the headset

Muting the microphone> Swipe• backward to mute or• forward to unmute the microphone.
You hear a tone.

Using Active Noise Cancellation (ANC)
This headset provides attenuation of ambient noise using Active Noise Cancellation (ANC) technology. Special
microphones optimize speech and reduce background noise.
When "Adaptive ANC" is selected, active noise cancellation depends on the intensity of ambient noise. The active noise
cancellation can be strong if the ambient noise is high, or weak if the ambient noise is low. You can control the extent ofnoise cancellation for the ANC Adaptive mode via the EPOS Connect app.

If you are in a noisy environment but would like to have your own quiet space, you can use the headset itself,
disconnected from any device, and simply benefit from ANC. You can activate ANC if the battery is sufficiently charged
and if the headset is turned on.

Good to know about ANC

•
•
•
•

Continuous uniform noise, such as motor or fan noise, is suppressed
Speech or high-frequency noise is reduced
If a slight noise in very quiet environments occurs: Deactivate ANC.
If unusual whistling or beeping noises occur: Take the headset off and put it on again and check the fit of the ear cups.

ADAPT 66x Bluetooth® headset

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Using the headset

Turns ANC Maximum mode on
Turns Adaptive ANC mode on;
adjustable via the EPOS Connect app
Turns ANC off

Adjusting the Adaptive ANC
The EPOS Connect app allows you to select different ANC
modes that offer the optimal settings depending on theapplication/situation.

EPOS
Connect

Adaptive

For example, low-frequency noise can be suppressed, windnoise can be minimized or a possible feeling of pressure
on the ears can be avoided.
> Start the EPOS Connect app.

Noise Cancellation
Adaptive> Open Noise Cancellation.
> Change the intensity of the Noise Cancellation.

Turning TalkThrough on / off
TalkThrough allows you to communicate with your colleagues without having to remove the headset, even when ANC isturned on. Media playback will be paused or muted.

2x

ADAPT 66x Bluetooth® headset

Activates / deactivates TalkThrough16

Making calls using the headset

Making calls using the headset
The following functions depend on the connected device.

Making a call
> Initiate the call on your connected device.
SoftphoneOR> Press the Teams/Pairing button to initiate a call via yoursoftphone.

x

If your call is not automatically transferred to the headset:> Search this function in the instruction manual of yourconnected device.

Accepting / rejecting / ending a call
When you receive a call, you hear a ring tone and the LED flashes blue.

3x
Softphonex

Accept / hold a call

Accepts a call

2x

If Smart Pause is activated (see page 23):
> Lift the headset from the desk and put it on.

The sensor registers motion and the incoming call is accepted.
> Lay down the headset.

The call is put on hold.
> Put the headset on again to resume the call.

ADAPT 66x Bluetooth® headset

Puts an active call on hold (pause)

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Making calls using the headset

Reject / end a call

1s

Rejects a call

1s

Ends a call

Redialing

Swipe and hold: Redials the last
number

ADAPT 66x Bluetooth® headset

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Making calls using the headset

Using the voice assistant / Alexa / voice dial
The last connected Bluetooth device will be used for voice assistant or voice dial.
For Microsoft Cortana: see page 20.
Before you can use Amazon Alexa as a voice assistant, you have to add the headset to the Amazon Alexa app – see
below.

2s

Activates voice assistant / Alexa /voice dial
Cancels voice assistant / Alexa /voice dial

Connecting the headset to Amazon Alexa> Start the EPOS Connect app on your mobile device.
> Open the settings and activate Amazon Alexa for yourAmazonAlexa

EPOS
Connect

Amazon Alexa

ADAPT 660 headset.
> Start the Amazon Alexa app and select Add Device.
> Select ADAPT 660 from the list of found devices toconnect the headset to Alexa.

There are on-screen notifications to guide you
through the settings.

ADAPT 66x Bluetooth® headset

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Making calls using the headset

Managing multiple calls
You can use the Headset with up to two connectedBluetooth devices.
x

SoftphoneTwo calls can be managed simultaneously.
If you receive a call during an active call, a knock on tone
will be played.

3x
Accept / reject second call

Softphone

Active callx

2nd incoming call
Accepts the incoming call andends the active call

2x

Accepts the incoming call andputs the active call on hold1s

Rejects the incoming call andcontinues the active call

2x

Toggles between the active and held call

1s

Ends the active call and makes the held call active

Toggle between calls / end active call

Softphone

Active call

ADAPT 66x Bluetooth® headsetx

2nd held call

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Using headset and dongle with Microsoft® Teams / Cortana

Using headset and dongle with Microsoft® Teams / Cortana
To use Microsoft Teams and Cortana with the headset:> Plug the dongle into the USB port of your computer –see page 8.
If Microsoft Teams is already running, the blue LEDchanges to purple automatically.

Invoking Microsoft® Teams and check notifications> Start Microsoft Teams on your computer.

The dongle connects to Microsoft Teams and the blue
LED changes to purple.

The LED pulses purple to indicate:• Meeting Join Notification• Voice Mail Notification• Missed Call Notification
3x these Notifications on your screen:
To check> Press
3x the Hook button.

Activating and using Microsoft® Cortana
You can activate and use Cortana – Microsoft’s Personal
Digital Assistant using Voice command technology – withthe headset.
3x> Press the Teams/Pairing button.

3x The Dongle LED flashes purple while activating Cortana.

The LED lights up purple and Cortana is ready to use.

1s

ADAPT 66x Bluetooth® headset

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Listening to audio using the headset

Listening to audio using the headset
You can listen to audio via a connected device. The following functions depend on the connected device.
> Play the media on your connected Bluetooth device.

The LED on the dongle lights up blue.

x

Plays audio

Pauses audio

Plays the next track in the playlist

Swipe and hold: Fast-forwards the track

Plays the previous track in the playlist

Swipe and hold: Rewinds the track

If you receive and accept a call, media playback is paused and restarts after the call – if supported by theconnected device.
If Smart Pause is activated (see page 23):
> Lay down the headset to pause media playback.

> Put on the headset to resume media playback.

ADAPT 66x Bluetooth® headset

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Additional functions

Additional functions
Charging the headset battery> Connect the supplied USB cable to the USB socket of the headset and a USB socket of your computer.

The battery is being charged. The LEDs light up depending on the battery status of the headset and turn off when thebattery is fully charged.
LED

Battery status

LED

Battery status

between 81 and 100%

between 21 and 40%

between 61 and 80%

between 2 and 20%

between 41 and 60%

weak: <2%

To end charging:> Disconnect the USB cable from the headset.

• When the battery is flat, the headset turns off automatically.
• Switch the headset off for faster charging.

ADAPT 66x Bluetooth® headset

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Additional functions

Verifying remaining battery power
The remaining battery power is shown in the
EPOS Connect app.
Some mobile devices indicate the battery status of theheadset.

80%

You can retrieve information on the remaining battery power at any time – except while you are in a call:> Tap and hold the finger on the touch pad until a voice prompt is announced.

LED?

Remaining battery power
more than 80%
more than 60%
more than 40%
more than 20%

4s
more than 2%

When the battery power drops below 2%, the LED flashes red and “Recharge headset” isannounced several times.

Activating / deactivating the Smart Pause function
The headset is equipped with a motion sensor that registers when the headset is put in or out of rest position. By factory
default, Smart Pause is inactive.

EPOS
Connect

Smart Pause

You can use the following functions:• Media playback pauses when you remove the headset
and continues when you put it on again.
• A call is accepted when you put on the headset• A call is put on hold when you remove the headset
during a call and resumed when you put it on again.
> Start the EPOS Connect app.
> Go to Settings.
> Activate or deactivate Smart Pause.

ADAPT 66x Bluetooth® headset

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Additional functions

Changing the sound effect
You can use these settings to enhance the quality of your audio according to its genre or category.
The sound effects are automatically activated when
the headset and the mobile device are connected via
Bluetooth or the USB cable.

EPOS
Connect

Club

To change the sound effect:> Start the EPOS Connect app.

Acoustic ModesClub> Open Acoustic modes.
> Swipe to your mode – see table below.
> Go back to the home screen to save the setting in theapp and for the headset.
Mode

Meaning

Neutralneutral settingClub

for more room impression

Movie

for more exciting entertainment

Speechfor higher intelligibility e. g. podcasts or audiobooks> Tap on Adjustment, to customize the settings:

Director••••

Boost:
Spatial:
Reverb:DLC:

raises certain frequency ranges
simulates virtual external speakers
simulates a virtual room
dynamic level control

Activating / deactivating Call Enhancement
This function reproduces the voice of the person you aretalking to so naturally that you get the impression that theperson is in the same room and not at the other end of the
line.

EPOS
Connect

Call
Enhancement> Start the EPOS Connect app.
> Go to Settings.
> Activate or deactivate Call Enhancement.

Adjusting the Sidetone
Sidetone is the audible feedback of your own voice duringa phone call.
EPOS
Connect

Sidetone> Start the EPOS Connect app.
> Go to Settings.
> Move the slider to the desired strength for the Sidetone.
EPOS
Connect

ADAPT 66x Bluetooth® headset

You can also change these settings via
EPOS Connect.

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Additional functions

Enabling / disabling voice prompts, tones and changing language
You can change voice prompts, tones and language via the EPOS Connect app.
EPOS
Connect

You can also change these settings via EPOS Connect.

Enabling / disabling voice prompts and tones> Start the EPOS Connect app.
> Go to Settings.
> Tap on Tone & Voice prompts.

EPOS
Connect> Tap on:Off

Tone & Voice
prompts

Tone only
Tone & Voice prompts• Off
deactivates tones and voice prompts (few exceptions
e. g. rechargeable battery is empty)• Tone only
deactivates voice prompts• Tone & Voice prompts
activates tones and voice prompts

Changing the language of the voice prompts
By factory default, voice prompts are activated in English.
> Start the EPOS Connect app.
EPOS
Connect> Go to Settings.

Language
Tone & Voice
prompts

English> Tap on Tone & Voice prompts.
> Tap on Language of voice prompts and choose thecorresponding language from the list.

Reconnecting / disconnecting Bluetooth via the dongle
3x

Reconnecting Bluetooth> Tap the dongle’s button.

The dongle flashes blue and lights up dimmed blue.

Disconnecting Bluetooth

2x

ADAPT 66x Bluetooth® headset> Double tap the dongle’s button.

Bluetooth will be disconnected. The LED flashes 3 times
red.

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Additional functions

If you leave the Bluetooth range
The range between headset and Bluetooth device is device dependent. The transmission range largely depends onenvironmental conditions such as wall thickness, wall composition etc. With a free line of sight, the transmission range ofmost Bluetooth devices is up to 25 meters.

5 min

~25 m

If the audio quality deteriorates e. g. during a call or the link
breaks down completely:

If you re-enter the Bluetooth transmission range within
5 minutes, the connection is re-established.

> Re-enter the radio range of the Bluetooth device.

After more than 5 minutes re-establish the connection
manually:> Turn the headset off and on again.

Storing and transporting the headset

1

2

3

To avoid nicks or scratches on the headset:> Fold the ear cups inwards towards the headband.
> Store the headset in the case when not in use or when carrying it around. Keep it in a clean and dry environment.
If you do not use the headset for extended periods of time:> Charge the built-in rechargeable battery every 3 months for about 1 hour.

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Maintaining the products and updating the firmware

Maintaining the products and updating the firmware
Cleaning the products
CAUTION
Liquids can damage the electronics of the product!
Liquids entering the housing of the device can cause ashort circuit and damage the electronics.
> Keep all liquids far away from the product.
> Do not use any cleansing agents or solvents.
> Only use a dry cloth to clean the product.

Replacing the ear pads
For hygienic reasons, you should replace the ear pads from time to time. Spare ear pads are available from your EPOS
partner.

2

1

click

L
click

> Grab under the ring of the earpad from the outside andpull it off the ear cup hooks.

ADAPT 66x Bluetooth® headset> Put the new earpad on the upper and lower hooks andpress on all corners of the ear cup to securely lock it.

28

Maintaining the products and updating the firmware

Updating the firmware of the products
To update the installed firmware:> Install the free of charge EPOS Connect software (see page 11).

Updating the firmware of the headset

Updating the firmware of the dongle

1

1
USB-C

USB-A

> Connect the USB cable to your headset and yourcomputer.
The LEDs light up.

> Plug the dongle into the USB port of your computer.

The LED lights up.
> Start EPOS Connect.

2

If there is a new firmware available the software will guide
you through the update process.

EPOS Connectx

Replacing / removing the headset‘s rechargeable battery
The rechargeable battery must only be replaced or removed by an authorized EPOS service center.
> Contact your EPOS service center if the rechargeable battery needs to be replaced. To find the EPOS service partner

in your country, visit eposaudio.com.
Outside the warranty period, the rechargeable batteries may be replaced or re-moved by any qualified service center.

ADAPT 66x Bluetooth® headset

29

If a problem occurs ...

If a problem occurs ...
ProblemPossible cause

Solution

Headset cannot be
turned on

Rechargeable battery empty> Recharge the headset battery.

22

Active Noise Cancellation(ANC) cannot be turnedonRechargeable battery empty> Recharge the headset battery.

22

Headset turned off> Turn the headset on.

12

No audio signal or dropouts

Headset not paired with a Bluetooth > Pair the headset.
deviceHeadset cannot be
connected via Bluetooth

Page

8

Volume adjusted too low> Increase the volume.

13

Headset turned off> Turn the headset on.

12Computer: Headset not selected asaudio device> Change the Audio settings of your11

Headset not paired> Pair the headset with a Bluetooth device

computer.
8(max. 20 cm distance while pairing
between devices).
> Check if your Bluetooth device supports–

the HF or HS profile.
Bluetooth at headset turned off> Turn Bluetooth on.

12Bluetooth at mobile device turnedoff> Turn Bluetooth on.

–

Dongle not plugged in> Plug the dongle into the USB port of your8

Computer.
Microsoft Teams does notwork: LED blue instead of
purpleDongle or Microsoft Teams
disturbed> Unplug and plug the dongle again.

–> Re-start Teams on your device.

–

Beeps instead ofvoice prompts

Voice prompts disabled> Enable the voice prompts.

25

Headset does not
respond to Smart Pause
gestures

Smart Pause is deactivated byfactory default> Activate Smart Pause via the EPOS

23

Smart Pause may not becompatible with your media player> Try another media player or streaming

Software or hardware problems> Turn the headset off and on again.

12> Unplug and plug in the dongle again.

8> Clear the pairing list of the headset.

30> Clear the pairing list of the dongle.

30

Headset or dongle does
not react to any button
press

Connect app.
–app.

If a problem occurs that is not listed in the above table or if the problem cannot be solved with the proposed solutions,please contact your local EPOS partner for assistance.
To find the EPOS partner in your country, search at eposaudio.com.

ADAPT 66x Bluetooth® headset

30

If a problem occurs ...

Clearing the pairing list of the headset (Reset)

1

2

3x

4s

> Press and hold the Teams/Pairing button until the LEDs

4s

> Press and hold the Teams/Pairing button until the LED

lights up white one after the other.
The headset is in pairing mode.

flashes red 3 times.
The pairing list is cleared. The headset searches forBluetooth devices to pair with – see page 8.

Clearing the pairing list of the dongle (Reset)

1

3s

2

2x
3x

> Plug the dongle into the USB port of your computer.
> Press and hold the button until the LED flashes blue andred.

ADAPT 66x Bluetooth® headset> Double press the dongle’s button.

The LED flashes purple 3 times. The pairing list is cleared.
The dongle searches for Bluetooth devices to pair with –see page 8.

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If a problem occurs ...

DSEA A/S
Kongebakken 9, DK-2765 Smørum, Denmark
eposaudio.com
ADAPT 12/22,
66x BluetoothPubl.
A05headset®