Search query: wireless earbuds with microphone

Product: Williams AV DWS INT 2 400 ALK Digi-Wave 400 Interpretation System for 1 Presenter and 10 Listeners; Includes: DLT 400 Transceiver, (10) DLR 400 ALK Receivers, MIC 144 Headset, (10) EAR 022 Earphones
Brand: Williams AV
Relevance: Irrelevant
Williams AV DWS INT 2 400 ALK Digi-Wave 400 Interpretation System for 1 Presenter and 10 Listeners; Includes: DLT 400 Transceiver, (10) DLR 400 ALK Receivers, MIC 144 Headset, (10) EAR 022 Earphones

Key Features

Includes: (1) DLT 400 Transceiver, (10) DLR 400 ALK Receivers, (1) MIC 144 Headset Microphone, (10) EAR 022 Surround Earphones, (10) BAT 010-2 AAA alkaline batteries, (1) CCS 056 DW 11 System Carry Case and (1) CCS 061 GR Grey Silicone Skin

SPECIFICATIONS
DLT 400 Transceiver:

Operating frequencies: 2.4 GHz (ISM band); 2402 – 2476 MHz FHSS

Audio Frequency response: Intercom Mode 100-7200Hz/Other Modes 100-11500Hz

SNR: 73dB

THD: 0.1 % (Default Volume, 1kHz)

Microphone input: Internal microphone and 3.5 mm phone jack with electret microphone bias, adjustable gain with 63dB range

Range: Up to 900ft (274m)

Modulation: FSK

RF Output: 19dBm Typical

Security: 87 bit encryption (300 Series Compatiable), 87+128 bit Encryption, Encrpytion PIN, Lock for settings

Operating Tempurature Range: 14º to 113ºF

Battery life: Up to 16 hrs talk time

Weight: 3.3 oz

DLR 400 ALK Receiver:

Display: LCD shows status: Battery Level, RSSI, Group/Channel #

Frequency Band: 2.4GHz (ISM band)

Audio Frequency Response: Intercom Mode 100–7300Hz/Interpretation and other modes 100-11200Hz

SNR: 74dB (A-weighted)

THD: 0.1%

Antenna: Internal

Range: Up to 900ft (274m)

Battery Type: 2x AAA Alkaline Batteries

Weight: 1.7 oz.

EAR 022 Earphones:

Plug: 3.5mm mono

Driver Size: 23mm

Nominal Impedance: 32Ω

Freq. Response: 20-20kHz

Max Power Input: 30mW

Sensitivity: 118dB @ 1kHz

Weight: 15g
Includes: (1) DLT 400 Transceiver, (10) DLR 400 ALK Receivers, (1) MIC 144 Headset Microphone, (10) EAR 022 Surround Earphones, (10) BAT 010-2 AAA alkaline batteries, (1) CCS 056 DW 11 System Carry Case and (1) CCS 061 GR Grey Silicone Skin
Operating frequencies: 2.4 GHz (ISM band); 2402 – 2476 MHz FHSS
Microphone input: Internal microphone and 3.5 mm phone jack with electret microphone bias, adjustable gain with 63dB range
Security: 87 bit encryption (300 Series Compatiable), 87+128 bit Encryption, Encrpytion PIN, Lock for settings
Up to 900ft (274m) Range, FSK Modulation, 19dBm Typical RF Output