The advanced MX Vertical ergonomic mouse combines a design based upon scientific findings with the performance of the MX series. The hand rests on the mouse at an angle of 57 degrees, corresponding to its natural posture. This reduces the strain on muscles in the wrist and forearm, preventing related health damage. Precise control is enabled by a 4,000 DPI sensor with a very low error rate. At the touch of a button, speed and precision of the cursor can easily be adjusted for optimum control. The mouse includes an integrated rechargeable battery, enabling operation time of up to five months.