Headphone Amplifier Portable 35mm Stereo Audio Out Powered DualOutput with Lithium Battery and 2Level Boost Headphone Amplifier Headphone Amp

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--300? 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