Specification :

The BatteryFree Wireless Optical Mouse does not need the battery to keep powered on. It works with its partner - the Ingenious Mouse Pad. The Mouse Pad transfers instant & constant power to the mouse as a replacement of batteries. This is we so called: The Electromagnetic Induction Technology.
SPECIFICATIONS:
Key Number: 5 Interface: USB
Resolution:800 DPI
SurfaceUV Paint
Colors Beige
Input power5 Vdc, 50 mA
SYSTEM REQUIREMENT
WindowsMe/2000/XP/2003 USB Port IBM or Compatible Systems