【2.4GHz Wireless Mouse】Ensures a reliable connection, increasing the working distance to 33' (15m), eliminating delays, dropouts, and interference. (USB receiver is hidden in the battery compartment) 【High-Precision Optical Tracking】800/1200/1600 DPI resolution optical tracking technology provides higher sensitivity than standard optical mice for smooth and precise tracking on a variety of surfaces. 【ERGONOMIC DESIGN】Perfect ergonomic contour design provides all-day comfort, even during extended use. The blue LED light can be turned on/off with the switch at the bottom, giving you a cool feel. 【Compatible Platforms】For Windows 7, 8, 8.1, 10 and Linux. Works on laptops, Chromebooks, PCs, notebooks, and computers. (Batteries not included) The wireless USB mouse automatically turns off when the Nano receiver is disconnected or the computer is turned off.