They work where you work. Built for comfort, convenience, control and performance, you might need Cordless Optical Mouse for Notebooks that features an ergonomic design with soft non-slip rubber grips and side panels. They have one where you can instantly scroll horizontally or vertically, zoom in and out, with the ridged wheel that provides a better grip for side-to-side scrolling plus zoom, perfect for viewing digital photos and spreadsheets. A convenient mini-receiver snaps into the mouse for easy transport, turning it off. Extended battery life is up to 6 months (and longer with automatic on/off), with battery power indicator. It uses high-definition optical technology with 1000 dpi optical sensor that makes the Cordless Optical Mouse two and a half times more responsive than standard optical mice.