1. 4 port USB hub,USB1.1 and USB2.0.

2. Stereo Speaker,powered by USB or external power supply,suitable for CD player,MP3 and MP4.

3. Mouse Pad,Black compact panel and smooth movement which suitable for all kinds of mechanical mouse and optical mouse use.

4. Microphone output connection capability.

5. Flash blue light or seven-color light around the pad.

6. Support 5 kinds of digital memory cards listed as below:sd,mini sd,mmc,micro mmc,t-flash.