New 4-IN-1 Multifunction Mousepad + Calculator + Speaker + 4 Ports USB Hub

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Feature

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1) 3 ports USB hub， the board For all kinds of USB jack system.?

2) USB 2.0 interface， Compatible with USB 1.1

3) PS light board， Led blue backlight.?

4) Scientific design saves space of tabletop.?

5) Operate system: Window 98/ME/2000/XP/Vista， Windows 7， Mac OS 8.6