Features: 1.Specially designed for left?handed users, the mouse can reduce muscle strain and even eliminate the damage caused by using traditional computer mice for many years. 2.3 levels of DPI (800/1200/1600) meet general and gaming needs. Equipped with advanced optical engine, the product can provide faster response speed, smoother tracking and more accurate movement. 3.With an independent on/off button at the bottom, the mouse can effectively save energy. 4.The size of the vertical mouse will fit perfectly in the palm of your hand. And it's easy to use. 5.2.4GHz wireless technology can provide a reliable connection without any interference within a 360?degree range within 10 meters. Enjoy fast data transmission with the convenience of wireless technology. 6.Widely compatible with for Windows 2000/ Windows XP/ Windows 7/ Windows Vista/ Windows 98/ Linux/ Windows ME/ Windows 8/ Windows 10, etc. specification:Item Type: Wireless Left Hand Mouse Product Parameters: Type: Optical mouse Connection with Computer: Wireless Optical Resolution: 1600dpi Transmitting Power: +5db maximum Number of Keys: 6 keys Wireless Transmission Frequency: 2.4Ghz Adjustable Resolution: 3 gears and below Battery : 500mAh How to Use: 1. Turn on the mouse switch 2. Insert the wireless usb head into the computer interface 3. Mouse can be used PackageList: 1 x Mouse 1 x User Manual 1 x USB Head 1 x Charging Cable