Plug-and-play wireless mouse delivers simple, reliable wireless performance with no delays or dropouts. The tiny wireless receiver gives you a dependable connection with no software and no hassles. Simply plug in the tiny nano receiver and start using your mouse right away. The nano receiver is so small and unobtrusive that you can plug it into a USB port and forget about it. Compatible with Window-based and Mac computers, wireless receiver provides the reliability of a cord with wireless convenience and freedom. Using this advanced, 2.4 GHz wireless connectivity results in fast data transmission and virtually no delays or dropouts. The mouse's 12-month battery life makes sure you don't have to deal with the hassle of frequent battery changes. The On/Off switch and smart sleep mode help conserve power. Wireless Mouse M185 also features a contoured design that feels good in either hand and offers more comfort than a touchpad. Mouse includes the nano receiver and one AA battery.