The Kensington Pro Fit Ergo Vertical Wireless Mouse (Model K75501WW) is engineered for comfort and long-term wrist health. Its contoured body sits at a 46.7° ergonomic angle, mimicking a natural handshake to reduce forearm and wrist strain. An extended lip supports the little finger during broad motions, and six customizable buttons—including DPI adjustment (800/1000/1200/1600)—offer precision and flexibility. The nano USB receiver stores neatly inside the mouse and provides wireless connectivity up to 20 meters. A single AA battery powers the mouse for up to a year, and a built-in low-battery indicator ensures you’re never caught off guard. Backed by a limited 3-year warranty.