USB interface port, Plug and play, replace traditional sound rhythms default mode Connect a speaker or headphone directly to the adapter to enjoy the virtual 7.1 channel sound track. Connectors : USB Type - A, Stereo output jack, Mono microphone- input jack, Complaint with USB 2.0 Full -speed (12 Mbps) Support system - Windows 98SE/ME/2000/XP/Server 2003/Vista, Linux, Mac OS 10 or higher. Features and Advantages: Dual headphone and microphone interfaces. Two little LED lights to display working stations. The microphone recording function. Sound adjust buttons, convenient to control sound. Dynamic rotating sound field. Multichannel technology to realize the 7.1 channel of dynamic sound. Speaker and headphone mode switch function movement. Sound Mixer function. Output level adjustment. Put analogue signal (microphone and CD, MP3, TV, radio line signal) into digital signals and preserve function. Real USB Plug & Play. Drive 2CH speakers Directly & Support 3D positional sound and virtual 5.1 CH sound track. Function keys: Microphone mute, speaker, mute, sound, sound down. Support the common speakers or headset, with two pairs of microphone holes. Double mute switch button: the microphone mute buttons and sound output mute buttons.