Built for comfort, the Logitech V220 Cordless Optical Mouse for Notebooks features an ergonomic design with soft rubber grips. A convenient mini-receiver snaps into the mouse for easy transport.PRODUCT FEATURES:Ergonomic design with soft rubber grips: Increases your comfort with non-slip rubber side panels that also add control. A ridged wheel provides a better grip for scrolling;Enjoy up to 6 months of battery life (and longer with automatic on/off). Battery power indicator eliminates surprises;The mini-receiver snaps into the mouse, turning it off;The 1000 dpi optical sensor makes the Logitech V220 Cordless Optical Mouse two and a half times more responsive than standard optical mice;Side-to-Side Scrolling plus Zoom: Perfect for viewing digital photos and spreadsheets. Instantly zoom in and out; scroll horizontally or vertically.