Wireless Mini Travel Optical Mouse is ultra-compact for easy storing. It is a great solution for people on-the-go and ideal for notebook and netbook users. The included, small Nano receiver plugs into your laptop's USB port and can stay connected so no need to plug and unplug a bulky receiver or deal with cords. With 2.4GHz reliability and performance, the travel mouse ensures no delays in cursor movement. This 2.0 USB portable mouse is backward-compatible with USB 1.1 ports and is compatible with Windows XP, Vista, and Windows 7 and higher; Mac OS X 10.1 and higher; Linux kernel 2.6 and higher. Mouse includes one AAA battery for immediate operation.