Packge Feature:
Compliant 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;
Free switch between headphone and speaker;
Functions keys:Microphone-Mute， Speaker-Mute， Volume-Up and Volume-Down.

System Required:
Desktop or notebook PC with a USB port
Windows 98SE / ME / 2000 / XP / Server 2003 / Vista. Linux . Mac05 10 or higher.

Packge Includes:
1 x USB external 7.1 Channel Audio Adapter