Optical Wireless Mouse,Quieter clicking, quiet operation Cable-free, with USB nano receiver,Ergonomic shape,Optical sensor with selectable resolution: 1,000, 1,500 or 2,000 dpi,5 programmable buttons 1 button for mouse cursor sensitivity,Active range up to 5 m (wireless technology 2.4 GHz) Including 2 AA batteries (LR6)Plug & Play - simple connection via USB input without complex installation of the drive unit,Compatible with: Microsoft� Windows 8 or higher