[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 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 transmission loss. Gold Plated Input : 1 x Toslink(Inculded 1m 4.0/OD Toslink Cable), 1 x RCA(Coaxial); Gold Plated Output : 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 plugSupport audio format:PCMSignal-to-noise ratio:105dBResolution (1khz):94dBResponse frequency:20 Hz - 20 khz -0.2 db+ N:-90dBTotal Harmonic Distortion ():10 Hz - 20 khz 0.25 - -0.065%Deadline:0.577Sampling rate:32 - 192 KHzBit rate:16 - 24 bitsInput level:0.3VOutput level:3VMaximum output power:0.3wHeadphone output power:0 - 250 mwStorage temperature range:60-150Operating humidity range:10% - 80% rh (non-condensing)Storage humidity range:5 - 90% rh (non-condensing)ESD Protection Human Body Model:8 kV (air- discharge) 4 kV (contact discharge)Colour:BlackMaterial:ABSSize:About 70x60x20mmPackage Contents:1 x 192KHz DAC ConverterOnly 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.