USB2.0port;high-speed transmission and download USB multifunctional card reader Super mini stereo speakers with perfect sound output adjustable volume; enjoy your music to your heart's content internal high sensitive microphone with "PTT"(push to talk) Superb bravery LED blindingly bright makes you work comfortably The sound switch makes the sound and light to be easily controlled Be connected to external speakers, earphone or microphone freely Suitable for any kind of mouse to move on it freely System requirements: Windows Me/2000/XP/Mac OS; no driver's needed USB and audio cable, meet your need for superb working(cable length:1600mm) Dc jack provides you with stable power supply under certain circumstances. Adapters should be chosen according to 5V/500Ma requirement