Features: 1.The mouse is specially ergonomic designed for right?handed users to reduce muscle strain. Wrist pain, shoulder fatigue, carpal tunnel syndrome and tendinitis can all be relieved 2.Enjoy fast data transmission with the convenience of wireless technology. 2.4GHz wireless technology provide stable and reliable connection without any interference within a 360?degree range within 10 meters 3.Equipped with advanced optical engine to provide faster response speed, smoother tracking and higher accuracy movement. 3 level DPI (800/1200/1600) meets general and gaming needs 4.Come with intelligent power saving, the independent on/off button at the bottom can effectively save energy 5.Easy to use, solid and reliable 2.4GHz wireless connection, just plug and play. Vertical mouse size will fit perfectly in the palm of your hand. You can carry without restrictions 6.The product is compatible with for Windows 2000, for Windows XP, for Windows 7, for Windows Vista, for Windows 98, for OS X, for Windows ME, for Windows 8, for Windows 10, etc. specification:Item Type: Optical Vertical Mouse Connection with Computer: Wireless Optical Resolution: 1600DPI Transmitting Power: +5db maximum Number of Keys: 6 Keys Wireless Transmission Frequency: 2.4Ghz Adjustable Resolution: Three levels and below Polymer Lithium Battery: 500mAh How to Use: 1. Turn on the mouse power switch 2. Insert the wireless USB head into the USB interface 3. Mouse can be used PackageList: 1 x Mouse 1 x Charging Cable 1 x USB Head 1 x User Manual