Pioneering villi paint material, anti-slip and anti-wear; The mouse USES vertical design, holding the mouse in the most natural gestures, avoiding oppression of median nerve, long-term use can effectively prevent the mouse hand. Vertical grip type design, feeling more relaxed. The design of the mouse on the left side of the keyboard shortcuts to control web browsing function of forward and backward. The mouse on the left side of the unique lie groove design, fit to your palm perfectly. Thumb groove design, is the most healthy and comfortable height in accordance with the ergonomics professional strict detect, greatly reduced the pressure of the wrist and the compression of the median nerve, reducing distortion arm bone. It happened to be suitable for the size of the girl's hand, great for girl to use