The USB Virtual 7.1 Channel sound Adapter is a highly flexible audio inter face which can be used either with Desktop or Notebook systems.No drivers required, just plug and play for instant audio playback. also compatible with all major operation systems. Features&Specification: Complaint with USB2.0 Full -speed ( 12 Mbps ) specification Compliant with USB Audio Device Class Specification1.0 Compliant with USB HID Class Specification1.1 USB bus - Powered mode . no external power required Connectors : USB Type - A, Stereo output jack, Mono microphone- input jack Driverless - No driver required for Windows 98SE / ME / 2000 / XP / Server 2003 / Vista . Linux . Color: Black System requirement: Desktop or notebook PC with a USB port. Windows 98SE / ME / 2000 / XP / Server 2003 / Vista. Linux 10 or higher Package Included: 1 X USB 2.0 Virtual 7.1 Channel Sound Card Double Adapter