MEISTER 2.4GHZ WIRELESS OPTICAL MOUSE 2.4GHz technology that meets ISM automatic frequency hopping requirement for industry, commercial, and medical use. This effectively eliminates interference with other wireless devices. Extra long range 10 meter (33 feet) wireless distance. 800 - 2000 dpi high resolution mouse resolution Automatic power saving dormancy features based on inactivity, unplugging the receiver, or powering off your PC. Codeless intelligent connection technology, easy plug-and-play Mini receiver is easy to carry with you. it snaps into the mouse so you will never lose it!