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 NO DRIVER REQUIRED FOR WINDOWS 98 SE/ME/2000/XP/SERVER 2003/VISTA,LINUX,MACOC SYSTEM REQUIREMENT:DESK TOP OR NOTEBOOK PC WITH A USB PORT XEAR 3D (VIRTUAL 7.1  CHANNEL SOUND SIMULATION SOFTWARE)FOR WINDOWS XP/VISTA USB 1.1 THE USB VIRTUAL 7.1