EXCITED PROMOTION 2.4GHz Ultra-Slim Mini USB Wireless Optical Mouse 2.4GHz wireless transmission up to 10 meters operating distance. Intelligent connectivity, no need to code, plug-and play. Ergonomically designed, comfortable to use. New non-delay technology. DPI (3 modes) adjustable. Powered by 1 x AA Alkaline battery. (battery NOT included) With an ON/OFF switch. Intelligent power saving management. Low power consumption. Nano USB Dongle. Ultra slim, compact and lightweight, easy to carry. Decent and modern design. Ideal laptop and desktop companion for home and office use. Buttons: Left button, right button, rolling wheel, dpi switcher Operation range: Up to 10m Operation systems: Windows 98, 2000, ME, XP, Vista, Win 7 and more Power: 1 x AA battery (not included) (please choose color when buying, OR we send it randomly.Thank you) Mouse size: 104x62x25mm USB dongle size: 20x14x6mm Mouse weight: 75g Receiver weight: 3g Rated Voltage:3V Rated Current:13mA Package Content: 1x 2.4G wireless mouse ,1x wireless receiver