MAXIMUM HAND-FEELING Modern contoured shape, sweat-resistant, and skin-friendly finish are for maximum comfort and support. The thoughtful ring and little finger rest provide extra comfort. The sturdy scroll wheel with rubber makes sure that your hand will not slip when scrolling. PLUG & PLAY SUPER EASY TO USEReally plug & play design, no drivers need to be installed. 2.4GHz wireless transmission technology provides a powerful and reliable connection up to 43.0ft. Portable design makes it easy to store in a bag for traveling.