CROSS-COMPUTER CONTROL - game-changing capacity to navigate seamlessly on two computers and copy-paste from one to the other, using Logitech FLOWn ULTRA-PRECISE SCROLLING- micro-precision wheel packs more grooves per millimeter to make scrolling through long webpages faster and easiern24-MONTH BATTERY LIFE- the Logitech M585 just keeps going, with 24 months of power on a single AA batterynHYPER-FAST SCROLLING - Scroll through long documents or web pages faster and easier. Or, press the wheel and shift to click-to-click mode for precise navigationnCURVED DESIGN - domed shape that provides support for your palm comfortably during long hours of work or playnTalk about a game changer! With Logitech FLOW, M585 Multi-Device has the almost magical capacity to navigate seamlessly on two computers and copy-paste from one to the other – even if you're using a PC and a Mac.* It certainly beats sending yourself emails. M585 also comes with a host of other features to improve your productivity, your way: fast and easy scrolling through long web pages; five programmable buttons, including two handy thumb buttons; a 2-year battery life** and a curved, domed shape that supports your palm comfortably during long hours of work or play. Dual connectivity (Bluetooth or 2.4 GHz Logitech Unifying).