Multi-tasking at its finest: Talk about a game changer. M585 Multi-Device has the almost magical capacity to navigate seamlessly on two computers and copy-paste from one to the other. Every little detail is designed to boost productivity, your way: ultra-precise scrolling, five programmable buttons, a 2-year battery life, a curved, comfortable shape, laser-grade tracking and dual connectivity (Bluetooth or 2.4 GHz Logitech UnifyingTM).