The 4000 DPI high-precision sensor results in 4x less hand movement and reduces fatigue. The cursor speed switch instantly adjusts DPI speed and accuracy with the touch of a button. Features: Logitech MX Vertical Wireless Ergonomic Mouse is a great fit for medium to large size right hands NATURAL HANDSHAKE POSITION: MX Vertical?s natural handshake position reduces muscular activity by 10 percent compared to a standard mouse ? without any loss in overall performance. 57 VERTICAL ANGLE FOR IMPROVED WRIST POSTURE: MX Vertical?s unique 57 vertical angle reduces the pressure on your wrist, while your thumb is positioned comfortably on the thumb rest. USER TESTED. ERGONOMIST-APPROVED: MX Vertical has been designed and tested with criteria set out by leading ergonomists ? improve posture, lower muscle strain, and reduce wrist pressure. ADVANCED OPTICAL TRACKING WITH CURSOR SPEED SWITCH: The 4000 DPI high-precision sensor results in 4x less hand movement and reduces fatigue. The cursor speed switch instantly adjusts DPI speed and accuracy with the touch of a button. COMFORT FORM WITH TEXTURED SURFACE: MX Vertical is shaped for the human hand and smooth to the touch. Its unique form fits a variety of hand shapes and sizes, and the textured rubber surface assures a natural grip. Uses FSC-certified paper for responsible packaging; Certified carbon neutral: the carbon impact of the product and packaging has been reduced to zero Package Includes: 1 x Office wireless mouse Listing and template services provided by inkFrog