Features: USB DAC audio converter has analog output, coaxial or optical digital output, and earphone output, which can be output to earphone and used directly as USB sound card.USB audio sound card adapter is a highly flexible audio interface that can be used with laptop or desktop systems.No need for drivers, plug and play, and compatible for all major operating systems.Just plug the sound adapter into the USB interface, and then plug the headphones into the adapter.No external power supply required.Specification:Condition: 100 percent Brand NewInput: USBOutput: coaxial or optical or stereoSystem requirements: Windows 10 or Windows 8.1 or 8 or Windows 7 or Windows Vista or Windows XP or Mac OS X or higher or PS4 or Windows2000Distortion: THD and N: 0.006 percent (RL andgt 10 k )Signal to noise ratio: 102dbDynamic range: 102dbFrequency response: 16-bit 32k, 44.1k, 48kHeadphone impedance or output power:16 ohm or 281 mw32 ohm or 222 mw64 ohm or 144 mw300 ohm or 38 mwOperating temperature: 0 to 70Package List:1 x Adapter1 x USB Cable1 x ManualNote: If you want 5.1ch audio output, install the driver on your computerConnect the USB audio sound card to your USB interface. The computer comes with an attached USB cableThe operating system will automatically detect this new deviceConnect the speaker or earphone and microphone to the product.