This Logitech Signature M650 is smarter than it looks. It's got a SmartWheel that lets you switch between two scroll modes. Ratcheted for ultimate precision and fast for flying through long pages. The SilentTouch technology keeps your clicks super-quiet, so you won't get dirty looks at the library. And to help you tackle your workload faster, there are 2 programmable side buttons. You can assign your most-used shortcuts and macros to shave off a few precious seconds. Good to know - This version of the M650 is designed for people who use their mouse with their left hand - You can connect it using Bluetooth or the Logi Bolt USB receiver, so it's compatible with pretty much anything - It runs on a single AA battery and you won't have to worry about changing it for up to 2 years - You can customise the buttons, check battery life and more in the Logi Options+ app