Descriptions: 2.4GHz wireless transmission up to 25 meters operating distance Built-In mouse memory, no recording is needed after battery replacement Intelligent connectivity, no need to code, plug-and-play Ergonomically designed, comfort grip Many dormant class control and more power-saving hibernation connectionless 1000dpi, cursor more speedy and precisely With On/Off power switch,1AA battery last for 1 year Low power comsumption, the service life of one AA Alkaline battery is up to six months Low voltage alarm function Plug-and-forget tiny nano-receiver stays in your USB port so your mouse is always ready to use Decent and modern design High quality, with one year warranty Ideal laptop companion for home and office use. Package Contents: 1 * Mouse 1 * Nano Receiver 1 * Instructions 1 * AA battery ( not included,PLS NOTE)