Revolver F1 2.4G Wireless Mouse with Creative Patented Left Side Wheel Design, Best Choice for Daily Heavy-Use Office Workers Creative Ergonomic Side-Roller design - Experience the next generation of mouse now! Control the roller by your thumb can greatly ease your point finger and hand muscle. You may just try move your thumb, and you will find it is much easier than moving your point finger. With human engineering design, the curve of this mouse matches the curve of hands. Comfortable and relaxing to use With noble and elegant streamline design, this wireless mouse is suitable for various occasions. FCC and CE Approved!