XDUOO XQ-10 is a mini potable headphone amplifier with fashionable appearance, big power, high quality sound and is connected with PC, mobile phone and other players for improves the sound quality. It is a good partner in the outdoor, let you enjoy the high quality sound anywhere. Product Features: It is fashionable, light and potable. It can drive various types of earphones. Battery life up to 20 hours. It adopts rail-to-rail amplifier chip from TI company make it have largest dynamic scope and less distortion. Use aluminum-shielded case to prevent external interference noise Product Parameter: Power Source: DC 4.2V built-in li-polymer rechargeable battery Output power: 100mW (32Ω load) Frequency response:10Hz-100KHz(±0.5dB) Gain: +6dB THD+N: 0.001% (1KHz) S/N:104dB Suitable Headphone Impedance: 8ohm---300ohm Playback time: >20H Charging time: <2H Size: 62.5*36*10mm Weight: 30g color selction: black , silver Packing: 3.5-3.5 audio cable XQ-10 soft pouch user's manual warranty card