Dell Wireless Mouse WM326 (5MTFN) Reduce cable clutter with the Dell Wireless Mouse-WM326, providing the performance you want in a mouse with none of the wires Work in comfort thanks to a curved design that feels great in either hand. This lightweight yet compact mouse is designed to minimize stress in the hands and wrist With 1600 dpi laser tracking, the Dell Wireless Mouse-WM326 provides accurate tracking and responds on virtually any surface. The mouse also features seven buttons and includes a scroll wheel for added functionality. NOTE : USB is present inside the mouse next to the battery compartment