Say goodbye to the old way of using a mouse. Also say goodbye to hand cramps, wrist pain and elbow problems. The Logitech MX Vertical Mouse changes the mouse game for the better. It puts your hand in a natural handshake position that reduces muscular strain by 10 percent and delivers optimal ergonomic posture and performance. Other features include a 4000 DPI high-precision sensor and hyper-efficient tracking that translates to less hand movement. A single charge will also keep it powered for 4 months. A one minute charge will give you 3 hours of use. The mouse is reinvented.