The Sandberg Destroyer FlexWeight Mouse allows you to flex the weight of your mouse. The movement speed of your mouse is essential for your in-game performance, so the weight of the mouse plays an important part of your gaming results. There are 5 small weights built-in underneath the mouse, which you can easily change as you desire. The mouse is designed with a perfect grip, making it comfortable to use even for long gaming sessions. Features LED light in several colors which can be easily switch on a mouse button.