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 three computers. You’ll fly through documents and web pages using the hyper-fast scroll wheel, with hardly 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.