I dark field sensor means you can track virtually anywhere – even on glass. It’s faster and 5x more accurate than the basic mouse. Your hand rests ideally on the sculpted form and flow allows you to work across multiple computers and operating systems –transferring files, images and folders in one fluid workflow. Compared to regular Logitech Mouse without an electromagnetic scroll wheel. Compared to Logitech MX Master 2S mouse with Logitech options installed and smooth scrolling enabled. Requires Logitech options software. 4 mm Minimum glass thickness. Features & details Ultrafast Magspeed Scrolling: Experience the remarkable speed, precision and near-silence of magnetic scrolling with the reinvented MagSpeed Wheel which shifts between ratchet and hyper-fast modes Hand-sculpted for Comfort: ,