Work in your comfort zone with Ergo M575S wireless trackball, developed by Logi Ergo Lab experts, user-tested and certified by ergonomists for 25% less muscle strain in your forearm (1). Move your cursor with smooth and precise thumb control, on a sculpted ergonomic design that keeps your hand relaxed and forearm in a more natural posture. It also tracks on most surfaces, and since it doesn’t need to be moved - ERGO M575S is perfect for tight setups and busy desks. Now with quiet clicks. Connect in no time via Bluetooth or the included Logi Bolt Receiver, and enjoy hours of comfort with up to 18-month battery life. Less Movement, More Comfort: The sculpted shape of the ERGO M575S wireless trackball mouse keeps your hand relaxed for hours of smooth, precise tracking with thumb control - now with quiet clicks 25% less muscle strain in your forearm: This wireless ergonomic mouse has been developed with Logi Ergo Lab experts, user-tested and certified by ergonomists for all-day comfort Improved forearm posture: The ergonomic shape of the ERGO M575S supports your hand and realigns your forearm into a better posture throughout the day; a good fit for most hand sizes Work it your way: Experience enhanced control with 3 customizable buttons, time-saving shortcuts, and Smart Actions; adjust the cursor speed to your preference with the Logi Options+ App Save space with thumb control: With the ERGO M575S, you can move your cursor without moving your hand, making it ideal for small or space-saving setups and for use on any surface Easy to Connect, Long Battery Life: Connect your ergonomic wireless mouse using Bluetooth or the included Logi Bolt USB receiver; enjoy up to 18 months of battery life (AA battery included) Complete your setup: Pair the ERGO M575S with the Wave Keys ergonomic keyboard, featuring a cushioned palm rest that places your hands, wrists, and forearms in a natural typing position