Features: USB DAC audio converter has analog output, coaxial/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% Brand NewInput: USBOutput: coaxial/optical/stereoSystem requirements: Windows 10 /Windows 8.1/8 /Windows 7 /Windows Vista /Windows XP /Mac OS X or higher /PS4/Windows2000Distortion: THD + N: 0.006% (RL > 10 k )Signal to noise ratio: 102dbDynamic range: 102dbFrequency response: 16-bit 32k, 44.1k, 48kHeadphone impedance/output power:16 ohm / 281 mw32 ohm / 222 mw64 ohm / 144 mw300 ohm / 38 mwOperating temperature: 0 to 70Package List:1 * Adapter1 * USB Cable1 * 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/earphone and microphone to the product.