... specification 1.14) USB bus-powered mode, no external power required5) Connectors: USB TYPE-A, stereo output jack,mono microphone input ... jack6) Functional keys: microphone-mute, speaker-mute, volume-up, volume-down7) Include Xear 3D, the virtual 7.1 channel sound simulation ... XP/vista4) Stereo active speaker or stereo earphone5) Mono microphone(Optional) usb 6 channel 5.1 external audio sound card