The Califone 2.4 GHz Wireless Mouse adds sleek simplicity to any school or work day. This black mouse has a 32.8-foot working range and is powered by a single AA battery (included). Its three silent-click buttons are easy and comfortable to use whether you're working at your desk or on the go. The 3D wheel allows for smooth navigation, and the wireless design enables a wider range of motion. 1-year warranty.