Logitech Pro Mouse is built for endurance, versatility and comfort to help you succeed in a multi-device world. You'll be powering through tasks thanks to the Easy-Switch technology that lets you switch seamlessly between 3 computers. You'll fly through documents and web pages using the hyper-fast scroll wheel, and hardly spare a thought to changing batteries thanks to 24 months of power on one AA battery. The medium-sized sculpted shape fits comfortably under your hand, and the keys are designed to withstand up to 10 million clicks. You can connect to Windows and Mac via the tiny Unifying receiver or via Bluetooth Smart wireless technology.