Fosi Audio Q4 DAC Headphone Amp for PC, Desktop Digital to Analog Audio Converter for Home Stereo Amplifier and Powered Speakers, PC-USB/Optical/Coaxial Inputs, 3.5mm Headphone/RCA Outputs

PC-USB supports input sampling rate: 96K/24Bit

High and low sound adjustment range: ±6dB

Fiber/coaxial support input sampling rate: 192K/24Bit

Frequency response: 20Hz-20kHz (±3dB)

PC-USB support operating system: XP/W7/W8/W10/MAC/linux

Distortion: 0.01%

Amp output maximum power: 100mW 32Ω load

Signal to noise ratio: ≥105dB

Headphone matching impedance: 16-200Ω

Working voltage: DC5V

RCA output level: 2.3V

Size (L*W*H): 73.5*98*33MM (without knobs and terminals)

Include: 

Fosi Audio DAC-Q4

USB Charging Cable

PC-USB Cable

Optical Cable

User's Manual