Ergonomic Design: This mouse is designed for users to reduce muscle strain and even eliminate the damage caused by years of using a traditional computer mouse. Wrist pain, shoulder fatigue, carpal tunnel syndrome, and tendonitis can be relieved, or often eliminated, with regular use. Adjustable Wristband - Adjustable DPI settings allow you to change cursor sensitivity (800/1200/1600/2400) so you can Slow down tasks, require precision or increase browsing speed. This mouse no longer requires AA batteries. There are batteries in it. You just charged a USB cable. Don’t worry about buying batteries Windows: 2000/ME/XP(x64)/Vista/7/8, Mac OS X (V10.4 or later) an available USB port< /p>
