[. . . ] Caution: To use this product properly, please read the user's guide before installation. [. . . ] How to use the wheel Your mouse has a wheel that functions both as a wheel for Windows scrolling and also as a customized button. It can be used as a standard mouse button, click (press down) the wheel. Caution: It may sometimes interfere the sensor of the mouse, if your tabletop surface is in red color, transparent as glass or highly reflective like a mirror. Try to use a mouse pad or use your mouse on a different tabletop surface. Try one or more of the following: · Make sure you have installed the mouse correctly. ⷠMake sure the cable is plugged into the right mouse or USB port. Refer to your computer documentation for the correct port configuration. Disclaimer Information in this document is subject to change without notice. [. . . ] Using the ventilator To use the ventilator please use the ON/OFF button at the bottom side of the mouse. [. . . ]