Silent clicking design for left and right button fits the circumstance for using the mouse in public, such as library, dormitory, office and so on, and apart from blue light indication during recharging and light off after full recharge, this design results worry-free for disturbing others.There are not only left and right buttons (silent click), but also DPI adjusting button, scroll wheel and two side buttons. The function of the side buttons is helping you to back or forward when you browse website, which is more convenient for you.