The mouse is specially ergonomic designed for righthanded users to reduce muscle strain. Wrist pain, shoulder fatigue, carpal tunnel syndrome and tendinitis can all be relieved 3 level DPI (800/1200/1600) can meet general and gaming needs, equipped with advanced optical engine, can provide faster response speed, smoother tracking and higher accuracy movement Support intelligent power saving, the independent on/off button at the bottom can effectively save energy Easy to use, just plug and play. The size of the vertical mouse will fit perfectly in the palm of your hand 2.4GHz wireless technology can provide stable and reliable connection without any interference within a 360degree range within 10 meters. You can enjoy fast data transmission with the convenience of wireless technology