1.Clean and slide mouse pad 2.4 port USB 1.1 hub connector for video, MP3 and other USB digital equipment 3.Internal stereoscopic speaker for Catalogening music and chatting, no need other extra power 4.Internal microphone for direct talk 5.With stereoscopic connector for headset and audio output 6.With microphone connector for output 7.With SD/MMC CardReader 8.Min LED indicator 9.No need to drive for supporting Windows XP/2000/98SE/Linux 2.4& Mac OS 8.5