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、3 level DPI (800/1200/1600) can meet general and gaming needs, equipped with advanced optical engine, can provide faster response speed, smoother tracking and higher accuracy movement 3、Support intelligent power saving, the independent on/off button at the bottom can effectively save energy 4、Easy to use, just plug and play. The size of the vertical mouse will fit perfectly in the palm of your hand 5、2.4GHz wireless technology can provide stable and reliable connection without any interference within a 360‑degree range within 10 meters. You can enjoy fast data transmission with the convenience of wireless technology 6、The product is compatible with for Windows 2000/Windows XP/Windows 7/Windows Vista/Windows 98/OS X/Windows ME/Windows 8/Windows 10/etc. Item Type: Optical Vertical Mouse Connection with Computer: Wireless Optical Resolution: 1600DPITransmitting Power: +5db maximum Number of Keys: 6 Keys Wireless Transmission Frequency: 2.4Ghz Adjustable Resolution: Three levels and belowBattery Specification: 2 x AAA batteries (not included) 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 1 x Mouse 1 x User Manual 1 x USB Head