Brand: Logitech Model: ERGO M575S Type: Wireless Ergonomic Trackball Mouse Control: Thumb-operated trackball for smooth and precise tracking Comfort: Contoured ergonomic shape for relaxed all-day use Muscle Support: Designed to reduce forearm muscle tension by 25% Posture: Supports improved hand and forearm alignment Hand Fit: Suitable for most hand sizes Buttons: 3 customizable buttons Customization: Supports shortcuts, Smart Actions and cursor speed adjustment through the Logi Options+ app Clicks: Quiet click design Space Saving: Tracks without moving the mouse, ideal for compact workspaces Surface Use: Suitable for use on various surfaces