Allnice&reg; Portable Computer Accessories 2.4G Wireless Optical Mouse Cute Animal Tail Cordless Mouse for Windows7 Vista XP MAC OS X - White + Blue Compact size, easy to carry. Comfortable hand touch, designed for notebook and netbook users. Perfect for home and office use; Optical tracking technology mouse works on many different surfaces. Wireless curved mouse connects via USB receiver; Powered by AAA size battery (battery not included). Mouse is compatible with most laptop and desktop computer models; Easy to use scrolling function and DPI switch.