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.

Spec:
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: Brand New
Input: USB
Output: coaxial/optical/stereo
System requirements: For 10, 8.1, 8, 7, Vista, , OS X or higher, ,
Distortion: THD + N: 0.006% (RL > 10 k Ω)
Signal to noise ratio: ≥102db
Dynamic range: ≥102db
Frequency response: 16-bit 32k, 44.1k, 48k
Headphone impedance/output power:
16 ohm / 281 mw
32 ohm / 222 mw
64 ohm / 144 mw
300 ohm / 38 mw
Operating temperature: 0℃ to 70℃
Package List:
1 * Adapter
1 * USB Cable
1 * Manual
Note:
If you want 5.1ch audio output, install the driver on your computer
Connect the USB audio sound card to your USB interface.
The computer comes with an attached USB cable
The operating system will automatically detect this new device
Connect the speaker/earphone and microphone to the product