Logitech Ergo M575S Trackball Mouse

Minimise movement and maximise your comfort with ERGO M575S wireless trackball--now with quiet clicks. With thumb control you won't need to move your arm to move the cursor, so your hand stays fully supported on the sculpted ergonomic design. A good and snug fit for most hand sizes. Features: - 3 customisable buttons - 18 months of battery life - Up to 10 m of wireless range -