The sound card is automatically detected after plugging in, the drivers are installed completely automatically on Windows XP, Windows Vista, Windows 7 and Mac without additional driver CD. Backward compatible to USB 1.1: USB bus-power mode (no driver installation required). via Skype, TeamSpeak and various other messenger services. The sound card is compatible with USB 1.1. The device also offers excellent possibilities to use Internet telephony e.g. Technical data: Chip: CM108 Model Type: USB 7.1 Sound Card Dynamic 3D Surround Sound Interface: USB 2.0 (backward compatible to USB 1.1) Connections: 3.5mm Jack Audio Out ⁴ 3.5mm Jack Microphone In No additional power supply required Dynamic 3D Surround Description: Add a powerful sound card to your notebook or computer with this USB stick. Usb Sound Card 5.1 USB 2.0 Digital 7.1 8ch 3D Surround Sound Card With Optical Cable And Audio Card External Technical data: Chip: CM108 Model Type: USB 7.1 Sound Card Dynamic 3D Surround Sound Interface: USB 2.0 (backward compatible to USB 1.1) Connections: 3.5mm Jack Audio Out ⁴ 3.5mm Jack Microphone In No additional power supply required Dynamic 3D Surround Virtual 7.1 Sound Effects Plug, Play for Windows XP, Vista, 7, 8,8,1, Mac OS X No additional driver installation requiredPackage List: 1x External USB 7.1 Sound Card