The ComputerUSB Vertical Laser Mouse places your hand in a natural vertical position, like a handshake. The traditional horizontal mouse forces you to hold your hand at an abnormal angle, which in turn puts your arm in static, twisted position. Repeated tiny, fast movements with tensed muscles can cause temporary pain and prolonged injuries. The mouse uses the laser technology, different from traditional optical mouse. This feature is suitable for almost all surfaces, including glass surface.

2.4G Vertical Wireless Mouse
It is suitable for window/2000/ME/XP/NT/Vista
Wireless USB receiver
It has rolling wheel
800dpi resolution
power:30MA2(3.7V/180MAH Rechargeable battery)
USB wire charging two hours every time
You can use the mouse when it is charging