Comes with a headphone output for private audio listening. Use of safe and reliable USB B type port, to send high-quality USB cable, without power, plug and play.Enable you to output to the amplifier, an integrated sound card as a computer upgrade products, can be connected to the decoder, will be sent back to the best level of sound quality. (5.1 channel is incompatible, please set the audio output to PCM or LPCM)Compatible with both Windows XP and OS-X, For best playback in Windows. Compatible with , , , One S,which can be connected your headphones by USB DAC for playing games.HiFi Headphone Amplifier, supports most headphones of high impedance 16-300ohm, signal-to-noise ratio 100Db, + N = 0.0003%, fully filter noise, enjoy high-quality audio.Provides the easiest way to convert your PC into a hi-end music server. Join who have already upgraded. Once you get used to playing CDs from your computer, you'll never want to go back to a traditional transport.Input: USBOutput: coaxial/optical/3.5mm stereo/R/LSystem requirements for:Windows 10Windows 8.1/8Windows 7Windows VistaWindows XPor above, , , One SWindows2000Distortion: + N: 0.006% (RL 10 k): equal 102dbDynamic range: equal 102dbFrequency Response: 16 Bit 32k, 44.1k, 48kEarphone Impedance/Output Power:16ohm/281mW32ohm/222mW64ohm/144mW300ohm/38mWOperating Temperature: 0 to 70size: 10.6 x 6.6 x 2.6cmMaterial:ABScolour:blackPackage Contents:1 x USB DAC Audio Converter1 x USB Data CableOnly the above package content, other products are not included.Note: Light 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.