Features 1.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. 2.USB audio sound card adapter is a highly flexible audio interface that can be used with laptop or desktop systems. 3.No need for drivers, plug and play, and compatible for all major operating systems. 4.Just plug the sound adapter into the USB interface, and then plug the headphones into the adapter. 5.No external power supply required. specificationFeatures: _x000D_ _x000D_ 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. _x000D_ USB audio sound card adapter is a highly flexible audio interface that can be used with laptop or desktop systems. _x000D_ No need for drivers, plug and play, and compatible for all major operating systems. _x000D_ Just plug the sound adapter into the USB interface, and then plug the headphones into the adapter. _x000D_ No external power supply required. _x000D_ _x000D_ :_x000D_ Condition: 100% Brand New_x000D_ Input: USB_x000D_ Output: coaxial/optical/stereo_x000D_ System requirements: Windows 10 /Windows 8.1/8 /Windows 7 /Windows Vista /Windows XP /Mac OS X or higher /PS4/Windows2000_x000D_ Distortion: THD + N: 0.006% (RL > 10 k )_x000D_ Signal to noise ratio: 102db_x000D_ Dynamic range: 102db_x000D_ Frequency response: 16-bit 32k, 44.1k, 48k_x000D_ Headphone impedance/output power:_x000D_ 16 ohm / 281 mw_x000D_ 32 ohm / 222 mw_x000D_ 64 ohm / 144 mw_x000D_ 300 ohm / 38 mw_x000D_ Operating temperature: 0 to 70_x000D_ _x000D_ Package List:_x000D_ 1 * Adapter_x000D_ 1 * USB Cable_x000D_ 1 * Manual_x000D_ _x000D_ Note: _x000D_ If you want 5.1ch audio output, install the driver on your computer_x000D_ Connect the USB audio sound card to your USB interface. _x000D_ The computer comes with an attached USB cable_x000D_ The operating system will automatically detect this new device_x000D_ Connect the speaker/earphone and microphone to the product PackageList