Adnet USB Virtual 7.1 Channel sound Adapter is a highly flexible audio interface which can be used eiter Notebook system. Bundled with xear 3D Sound simulation software. It turns your stereo speaker or earphones into 7.1 channel environment. No drives required, just plug and play for instant audio playback, also compatible with all major operation systems. Features & Specification Complaint With USB 2.0 Full-speed (12Mbps) Specification Complaint With USB Audio Device Class Specification 1.0 Complaint 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 Functional Keys: Microphone-Mute, Speaker-Mute, Volume-Up, Volume-Down LED indicators: Microphone-Mute Status, Activity Include Xear 3D, the virtual 7.1 channel sound simulation software for Windows XP/Vista Driveless - No driver required for Windows 98SE / ME / 2000 / XP / Server 2003 / Vista Linux, MacOS System Requirement Desktop or notebook PC with a USB port Window 98SE / ME / 2000 / XP / Server 2003 / Vista, Linux, MacOS 10 or higher Xear 3D (Virtual 7.1 channel sound simulation software) for Window XP / Vista Stereo active speaker or stereo earphone Mono Microphone (Optional).