M190 wireless mouse features a contoured design that follows the natural curve of medium to large hands. It provides all-day comfort thanks to the arched palm support and special button scooping for ideal finger placement. You'll work wirelessly and move freely from up to 33 ft away with virtually no delays or dropouts. No cable means no clutter on your desk. An 18-month battery life means you can work worry-free, thanks to the power-saving mode which automatically kicks in when you're not using the mouse. You'll get great-quality navigation with precision tracking and line-by-line scrolling. Connector/Port/Interface: USB; Left/Right Hand Use: Left/Right; Mouse Technology: Optical; Wired/Wireless: Wireless.