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