This is the wireless mouse that matches the natural movements of your hand and wrist to prevent carpal tunnel syndrome. Unlike the typical mouse that imposes a fixed position for a user's wrist--a leading cause for Repetitive Stress Injury--this mouse tilts and pivots around a pedestal that serves as its base, providing comfortable, relaxed flexion for the wrist, reducing cramping and fatigue. The pedestal's bottom glides over a mousepad when used, communicating with a computer running Windows 7, Vista, or XP or a Mac using its USB wireless adapter. It has a left and right button and a scroll wheel. Two AA batteries (included) provide 10 months of operation.