Features: An optical fiber and a coaxial input interface. Connect to DVD, HD player and other devices, an RCA output interface, and connect to the power amplifier system One channel 3.5mm audio output connector, connected to headphones. Eliminate noise without input signal and automatically mute non audio signal when input. It supports 192Khz 24bit sampling rate. Support volume adjustment, Support bass adjustment, Metal , anti-interference. : Supported audio formats PCM Resolution (1kHz) 94DB Response frequency 20Hz-20KHz-0.2db Signal to noise ratio ()- 100DB Total harmonic distortion ( + n) 10Hz-20KHz 0.25 -0.065% Blocking time 0.57Fs Sampling rate 32-192 kHz Bit rate 16-24 bits Output electrical level 7V Headphone output power (RL-322)30mW Output impedance 47 ohms Operating voltage+ 5V. Maximum voltage: 6V Maximum power consumption 100mA Operating temperature range 10-70 Storage temperature range- 60-150 Operating humidity range 10% - 80% RH (no condensation) Storage humidity range 5-90% RH (no condensation) Material: aluminum alloy colour: black Package Contents: 1 x 192KHz DAC Converter 1 x Optical Cable 1 x USB Power Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.