Patent number: ZL 2006 3 0153840.8
Functions: page up/down, trackball mouse, or mouse wheel
Dimensions: 7.8 x 4.2 x 3.8cm
USB Plug-and-play, no driver required
Operating system: Windows 98, SE, ME, 2000, XP, Mac OS, Linux, and Vista
Packing: gift box or blister packing