Headphones Amplifier Portable 3.5mm Stereo Audio Out Powered Dual-Output with Lithium Battery and 2-Level Boost Headphone Amplifier (Headphone Amps)
Brand: Y.D.F
Color: Headphone Amplifier

Portable Headphone Amplifier
Us this Headphone Amplifier which make it Compact, Lightweight convenient to carry, can output remarkable sound without distortion.
High/Low gain switch for optimal performance of the headphones.
Input: 3.5mm AUX
Output: 3.5mm AUX
SNR: ≥120dB
Load Impedance: 16--300Ω
Frequency response: 20Hz-20kHz(±3dB)
More Than 15 Hours using Time
Charging voltage: DC5V
Headphone Amplifier Compatibility:
iPhone6, iPad，MP3，MP4 and Computers ect products suitable for 3.5MM headphone port.
Note:
Do not use it while charging, it is not safe, and the current will make noise.
Operation
Step1: Make sure to turn the VOL knob to the minimum.
Step2: Connect the input with audio source.
Step3: Connect the output with headset.
Step4: Turn the knob clockwise to turn on the power.
Step5: Wear headphone and adjust the volume.
Package Included
1 x Headphone Amplifier
1 x USB Power Cable
2 x Audio Cable
1 x User Manual

Portable Headphone Amplifier which make it Compact, Lightweight convenient to carry, can output remarkable sound without distortion.
More Than 15 Hours using Time, Load Impedance is 16--300Ω.
High/Low gain switch and a bass boost for optimal performance of the headphones.
3.5mm AUX Input and Output. Works for SONY， Sennheiser RS120, HDR 120 and beyerdynamic headphone.
Do not use it while charging, it is not safe, and the current will make noise.