MX-958 3D Combo Optical Mouse [MS-95-8R-MC] is the state-of-art professional Mouse. With the Ergonomic design, MX-958 is designed to be comfortable and specially fit for your hand position and avoid fatigue after use it for long period. Tranquil-design wheel for scrolling four contact points to reduce resistance and ensure excellent mobility and easy to control on different surfaces. Specially, it is a cute mouse with colorfull liquid and a small duck inside. Children like it so much.