This Syba Sonic SD-DAC63095 USB to Audio Adapter lets you add headphone and microphones to your computer without the need to unplug other devices. With this digital interface between your computer and the music system, the sound quality is enriched in your overall music environment. By converting a single USB port into an external sound card with microphone connectivity, you can conveniently bypass or replace an internal sound card without having to open your computer case.