With the MX Master 4, you can feel the precision. The Haptic Sense panel will give you feedback for notifications, specific shortcuts and actions. So you'll never miss a message. The MagSpeed wheel lets you fly through long pages in a flash and switch to precise scrolling when you need it. And to get the most out of your favourite apps, there's the Action Ring. You can customise this smart overlay for each up and load it up with your most used tools. Good to know - Reduce wrist ache - it's designed for more natural wrist postures and has optimally placed thumb controls - With Quiet Click buttons you get a satisfying clicky feel without the annoying noise - Customise buttons and build profiles with Logi Options+ - Pair your mouse with up to 3 devices using Bluetooth or the Logi Bolt receiver