Designed for medium to large hands, the blue Logitech M190 features an ergonomic profile that naturally follows the curve of your palm for hours of comfortable work. Its 1000 dpi optical technology ensures precise tracking on most surfaces, while the wireless connection via USB nano receiver keeps your desk free of clutter. With up to 18 months of battery life from a single AA battery and a weight of just 89.9g, it is as unobtrusive in your hand as it is on your desk. The mechanical scroll wheel and 3 buttons allow for immediate use, with no complex setup required.