Product Info : USB Stereo Audio Adapter, RoHS Compliant with USB 2.0 Full Speed (12Mbps) Specification Compliant with USB Audio Device Class Specification 1.0 Compliant with USB HID Class Specification 1.1 USB bus-powered mode, no external power required. Connectors: USB Type-A, Stereo output jack, Mono microphone-input jack LED indicators: Microphone-Mute Status, Activity Support Windows 98SE/ME/2000/XP/Server 2003/Vista, Linux and Mac OS. Included : USB Stereo Audio Adapter, and User manual. Dimensions (L x W x H in inches) : 2.50" x 1.00" x 0.31" Weight : 0.5lbs Warranty : 1 Year