Scientific ergonomic design encourages neutral and healthy “handshake” wrist and arm positions for smoother movement and less overall strain. Ideal for people who work with the computer for a long time every day. (Note: The USB-Nano receiver is inside the cover at the bottom of the mouse. Before taking out the USB receiver, please open the black cover.) Adopt 2.4GHz wireless technology , it can work stably and quickly at a distance of 10m without interference.Silent Click: Special silent design for the right and left buttons, helps you create a quiet atmosphere without disturbing others. 800/1200/1600 DPI resolution optical tracking technology provides greater sensitivity than standard optical mice for smooth and precise tracking on a wide range of surfaces. energy efficient energy and significantly extends battery life. Compatible with most systems including Windows 7/8/10, XP, Vista and Linux. Suitable for Laptop, PC, Notebook, Computer and other device.