1. [ERGONOMIC DESIGN] This wireless vertical carpal tunnel mouse is designed to reduce the muscle difficulty of users, and even a traditional computer mouse may take back the damage to the cause of use. For arthritic hands, this mouse can alleviate wrist pain, shoulder fatigue, carpal tunnel syndrome and all tendinitis. 2. [Adjustable DPI and Next / Previous Buttons] Mice Adjustable DPI settings allow you to change the sensitivity of the marking speed of the mouse (allowing to reduce 800 /1200 /1600, allowing to increase the error, guaranteeing the error or allowing to increase the speed for form or allow to increase the Fortect, but allow to increase the Fortct, but to increase the mouse, or to increase the mouse, or to increase the mouse, or to increase the mouse, or to increase the mouse. Ergonomic mouse provides convenience in web page scanning superior choice and long -term people working on the computer; 3. And wireless, no additional cable is required, just put 2 AAa batteries on the mouse (not included). Install the USB receiver into the USB interface of the computer and you can work or use your computer anywhere and worry about the loss of the USB receiver, 4. You can put it back to the mouse after wide compatibility. (Note: The USB receiver is stored in the battery compartment of the mouse)