The Sandberg USB (Universal Serial Bus) to Sound Link is a compact external USB (Universal Serial Bus) sound card with connectors for both speakers & microphone. It allows you, for example, to connect an ordinary headset to your computer via a USB (Universal Serial Bus) port without you having to disconnect any sound equipment already connected to the computer. This completely removes the need for complicated internal installations & gives you the freedom to move your external sound card around, for example between your desktop & laptop computers. Product Features Supports Full Duplex (Simultaneous Playback & Recording Supports Microsoft Direct Sound 3D & A3D Sound Blaster 16 compatible Supports Direct Music