Natural Hand Position: The natural hand position of the MX Vertical wireless mouse reduces muscle strain by 10% compared to a standard mouse thanks to its functional design A Better Position Wrist: The MX Vertical Ergonomic Mouse by Logitech features a unique design with a 57-degree angle that reduces pressure on your wrist for more comfort Ergonomics Meets Performance: This wireless ergonomic mouse compatible with your PC or Apple computer has been designed and tested according to the criteria defined by leading ergonomists to reduce muscle tension Less Hand Movements: The high-precision optical sensor 4,000 DPI of the Logitech Vertical Mouse requires less hand movement and reduces fatigue. Also soft to the touch, the Logitech MX Vertical Mouse is designed to fit many hand shapes and sizes Fast Charging: The rechargeable MX Vertical Wireless Mouse lasts up to four months on a full charge and can work for three hours after just one minute of charging Easy-Switch and Compatible Flow