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)