Features: 1.The mouse adopts ergonomic design and is specially designed for the left hand. It feels comfortable and can reduce muscle strain. 2.There are 3 speeds of DPI adjustable, high sensitivity, can meet the needs of ordinary and gaming. 3.Equipped with advanced optical engine, it can provide faster response speed, smoother tracking and higher accuracy movement. 4.The mouse supports plug and play, and there is an independent switch button at the bottom, which can effectively save energy and power. 5.2.4GHz wireless technology can provide a reliable connection with less interference in long distances. 6.Widely compatible for Windows 2000/XP/7/Vista/98/Linux/Windows ME/Windows 8/10. specification:Item Type: Wireless Mouse Type: Optical mouse Connection with Computer: Wireless Optical Resolution: 1600dpi Transmitting Power: +5db maximum Key Number: 6 keys Wireless Transmission Frequency: 2.4Ghz Adjustable Resolution: 3-speed and below Battery : 2 x AAA batteries (not included) Size: Approx. 68 x 130 x 81mm / 2.7 x 5.1 x 3.2in How to Use: 1. Turn on the mouse switch 2. Insert the wireless USB receiver into the computer interface 3. Mouse can be used PackageList:1 x Wireless Mouse 1 x User Manual 1 x USB receiver