CROSS-COMPUTER CONTROL - Game-changing capacity to navigate seamlessly on two computers, and copy-paste text, images, and files from one to the other using Logitech FLOW DUAL CONNECTIVITY - Use with up to three Windows or Mac computers and laptops via included Unifying receiver or Bluetooth Smart wireless technology LONG BATTERY LIFE- The Logitech M585 just keeps going, with 2 years of power on a single AA battery ULTRA-PRECISE SCROLLING- Micro-precision wheel packs more grooves per millimeter to make scrolling through long webpages faster and easier CURVED DESIGN - Domed shape provides right or left hand support for your palm comfortably during long hours of work or play