PLUG AND PLAY - This wireless laptop mouse features a true plug-and-play design with no driver installation required. 2.4 GHz wireless transmission technology provides a strong and reliable connection with a connection distance of up to 33 feet (approximately 10.1 meters). PORTABLE SIZE & QUIET COMPUTER MOUSE--The portable design makes it easy to store in a bag, travel-friendly and portable and compact, making it ideal for travel. Responsive buttons provide a very soft click with less noise and no distractions for others. Additionally, the various color options and compact size make it the perfect choice to help you work smoothly. Comfortable Ergonomic Design - After thousands of palm data samples, we designed this ergonomic wireless optical mouse. COCNI wireless laptop mouse has a streamlined arc that significantly reduces the strain on hands, wrists, and arms from prolonged use. Additionally, the comfortable curved structure and hand support place less stress on the tendons and muscles of the forearm. Energy Saving and Long Lasting -- This USB mouse has an automatic sleep mode to extend battery life (battery not included). It automatically enters power-saving mode after 10 minutes of inactivity, click any button or move to wake it up. Bluetooth Mouse for Universally Compatible Laptops -- Perfect for Mac OS X 10.4 / Windows XP / Windows Vista / Windows 7 etc.