Feature:1. Adopt ergonomic design, the mouse is specially designed for right-handed users to reduce muscle strain. Wrist pain, shoulder fatigue, carpal tunnel syndrome and tendinitis can all be relieved2. 2.4GHz wireless technology can provide stable and reliable connection without any interference within a 360-degree range within 10 meters. Enjoy fast data transmission with the convenience of wireless technology3. 3 level DPI (800/1200/1600) meets general and gaming needs, equipped with advanced optical engine, can provide faster response speed, smoother tracking and higher accuracy movement4. Come with intelligent power saving, the independent on/off button at the bottom can effectively save energy5. Easy to use, solid and reliable 2.4GHz wireless connection, just plug and play. The size of the vertical mouse will fit perfectly in the palm of your hand. You can carry with you without restrictions6. Widely compatible with for Windows 2000/Windows XP/Windows 7/Windows Vista/Windows 98/OS X/Windows ME/Windows 8/Windows 10/etc.Specification:Item Type: Optical Vertical MouseConnection with Computer: WirelessOptical Resolution: 1600DPINumber of Keys: 5 KeysWireless Transmission Frequency: 2.4GhzAdjustable Resolution: Three levels and belowOperating Distance: Approx. 10meter / 32.8ftWheel Direction: Four-way wheelPolymer Lithium Battery: 500mAhHow to Use: 1. Turn on the mouse power switch2. Insert the wireless USB head into the USB interface3. Mouse can be usedSize: Approx. 72mm / 2.8in97mm / 3.8inHeight: Approx. 82mm / 3.2in.Package List:1 x Mouse1 x Charging Cable1 x USB Head