SHANLING H1 TPA6120A2 OPA2134 HiFi Portable Headphone Amplifier Silver

Functions:Using 1800MA lithium batteryUsing BB's TPA6120A2 Chip as headphone amplifier Using BB's OPA2134 chip to do preampUsing ALPS 100K * 2 potentiometers do volume controlHaving a low gain adjustment function Specification:1800MA lithium cellBB TPA6120A2 for headphone amplifierBB OPA2134 for pre-amplifierALPS 100K*2 as potentiometer for volume controllHigh and low gainMaximum output: 120mW/32O/12mW/300OFrequency response: 20HZ~20KHZ(-0.5dB)Input sensitivity: 520mV/47KO(low gain)/260mV/47KO(high gain)Harmonic distortion: <0.007%SNR: >98dBOutput Power: 120mW @ 32 ohms, 12mW @ 300 ohmsPower Supply (Adapter): DC5V / 1A USB port cargoBattery charging time: 1A adapter, full time about 6 Hours (turned off)USB port, full time about 10 Hours (turned off)Battery playing time: more than 13 hoursPower supply: Built-in rechargeable lithium polymer battery, the capacity 1800mAHRecommended Headphone Impedance: 16-300 ohmsDimension: 6 x 7.3 x 1.6 cmNet Weight: Approx 100g Package1 x H1 Unit1 x USB Cable1 x User Manual1 x Warranty Card