Usage Tips:[192 khz DAC conversion] Digital to analog audio converter, convert coaxial or toslink digital PCM audio signal to analog L/R RCA and 3.5mm jack audio at the same time (not able to reverse) [Support volume adjustment] Headphone amplifier function; there are professional audio amplifier chips and volume adjustment switches. Allows you to direct your headphones and adjust output volume. A similar amp function can provide better sound quality. [192 KHz 24-bit sampling rate] Support sampling rate at 32 KHz, 44.1 KHz, 48 KHz and 96 KHz and 192 KHz; 24-bit S/PDIF incoming bit stream in left and right channels, when there is no signal, it can be Eliminate noise input, and automatically mute while Non-audio signal input [Aluminum Metal Housing] Have aluminum metal housing which makes it durable, Heat-resistant and high quality; it can be easily installed and operated [Gold-plated input and output] Gold-plated interface to reduce signal mission loss. Gold Plated Input Audio Connectors: 1 x Toslink(Inculded 1m 4.0/OD Toslink Cable), 1 x RCA(Coaxial); Gold Plated Output Audio Connectors: 2 x RCA(R/L), 1 x 3.5mm Jack; by 5.5mm USB power cable (power adapter not included); don't use other plugs, does it only use 5 v 1 plug Support audio format:PCM Signal-to-noise ratio:105dB Resolution (1khz):94dB Response frequency:20 Hz - 20 khz -0.2 db THD + N:-90dB Total Harmonic Distortion (THD):10 Hz - 20 khz 0.25 - -0.065% Deadline:0.577 fs Sampling rate:32 - 192 KHz Bit rate:16 - 24 bits Input level:±0.3V Output level:3V Maximum output power:0.3w Headphone output power:0 - 250 mw Storage temperature range:60-150℃ Operating humidity range:10% - 80% rh (non-condensing) Storage humidity range:5 - 90% rh (non-condensing) ESD Protection Human Body Model:±8 kV (air-gap discharge) ±4 kV (contact discharge) Colour:Black Material:ABS Size:About 70x60x20mm