Fosi Audio N3 Portable Bluetooth Headphone Amplifier Receiver

Specification: Input: 3.5mm Output:3.5mm Capacity: 1050mAH（3.7V） Amp Using Time: More Than 12-15 Hours Working Voltage: 8.3V/1A SNR120dB Distortion: 0.004% Output Power: 40Mw in Impedance 16Ω Headphone Impedance: 16-300Ω Audio cable: 1m long, both male Phone to headphone amp（Note: 3.5mm adapter cable is not included, you need to buy it yourself） Two-stage gain switch： High/Low gain switch for optimal performance of the headphones. Make it possible output not only louder sound but a sharper and more Real stereo sound without distortion. Rechargeable lithium battery： Built-in 1050mAh Rechargeble Battery, Charge by Micro USB Cable, More Convenient to charge. Headphone amplifier using Time: More Than 8 Hours, Load Impedance: 16-300Ω. Two-Stage Gain Switch: Adjust the amplification level to suit your headphones with a low and high gain setting, ensuring optimal audio performance. Wide Compatible with a Various of Digital Devices, Such as MP3 MP4 Mobile Phone Computer.