The Targus wireless optical mouse features an 800 dpi optical sensor for smooth mouse movements. The ergonomic design reduces wrist strain for comfort and the mouse is ambidextrous for both left and right handed users. Wireless capability eliminates clutter from the workspace while RF 2.4GHz technology significantly reduces cordless interference and signal drops allowing the mouse to work up to 33 feet away. The mouse comes equipped with two high-quality Energizer batteries and is designed to provide up to 12 months of battery life depending on usage. The low power indicator light lets you know when a new set of batteries are needed. Featuring a sleek, comfortable design, the Targus wireless optical mouse provides wireless convenience and the mini USB receiver stores underneath the mouse so it's never lost and always ready for travel.