External USB Audio Sound Card Adapter - simply plug the adapter into your USB port, and then plug your headphones into the adapter.
USB bus-powered, no external power required.
Driver-less — No driver required for most operating systems
Connectors: USB Type-A, Stereo Output Jack, Mono Microphone-Input Jack
Features 4 buttons: Microphone-Mute
Speaker-Mute
Volume-Up
Volume-Down

The USB Sound Adapter is a highly flexible audio interface which can be used either with desktop or notebook systems. Simply plug the adapter into your USB port, and then plug your headphones into the adapter. Ta-Da! Stereo sound without the investment in a whole set of speakers! Tired of trying to stretch your cables around the back of your computer? Plug this Adapter into a USB port on the front, and use the headphone jack (for output) or the microphone jack (for input).
Specifications and features:
-Plug and Play. No drivers required for most operating systems.
-USB bus-powered, no external power required
-Connectors: USB Type A, Stereo output jack, mono microphone input jack
-Functions keys: Microphone-Mute, Speaker-Mute, Volume-Up and Volume-Down
-LED indicators: Microphone-Mute Status, Activity
-USB 2.0 Full-Speed (12Mbps) Specification
-USB HID Class Specification 1.1
-USB Audio Device Class Specification 1.0
-Dimensions: 2.25" x 1.0" x .50"