Logitech M191 is a large-size wireless mouse with a contoured design that follows the natural curve of medium to large hands. 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 10 meters* away – with virtually no delays or dropouts. No cable means no clutter on your desk. And 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 at an affordable price. *Wireless range and battery life may vary based on user, environmental and computing conditions.