ADVANCED ERGONOMIC DESIGN Places your hand in a natural handshake position using a unique 57 degree angle, preventing forearm twisting and reducing muscular strain by 10 percent* (*As compared with a traditional non vertical mouse. Based on Logitech Study, September 2017) HYPER EFFICIENT TRACKING 4000 DPI high precision sensor provides precise tracking that requires 4x less hand movement compared to a traditional mouse with a 1000 DPI sensor CROSS COMPUTER CONTROL? Game changing capacity to navigate seamlessly on three computers, and copy paste text, images, and files from one to the other using Logitech FLOW THREE WAYS TO CONNECT? Use with up to three Windows or Mac computers via included wireless USB unifying receiver or Bluetooth smart technology or the included USB C charging cable. Wireless Operating Distance 10m wireless RECHARGEABLE BATTERY With quick charging: Stays powered for 4 months on a full charge ? and get 3 hours of use from a 1 minute quick charge (Battery life may vary based on user and computing conditions). Batterylife:Rechargeable Li Po battery (240mAh)