Specification:

1) The battery free wireless optical mouse does not need the battery to keep
power on, but it works with its partner - the ingenious mouse pad
2) The mouse pad transfers instant and constant power to the mouse as a
replacement of batteries
3) Wireless optical technology delivers high resolution with pinpoint accuracy
4) The mouse pad is specially designed to be waterproof and does not warm
or heat up after constant long period of usage
5) As light as feather without the heavy weight batteries
6) Battery free technology brings enormous benefits to the public
7) Distinguished frequency adjustable tuning automatically solves the difference
in USB voltages, and tuned to optimum frequency keeps the unit in its best
status after four seconds
8) Provides a safe working environment with 125kHz frequency
9) System requirement: Windows ME/2000/XP/2003/NT/VISTA
10) Product dimensions: 312 x 240 x 45mm

Packing information: 

MEAS:57*38*50CM
G.W./N.W.: 15.5/13.5KGS QYT: 40PCS/CTN
Color box size; 26*17*4.5cm