Ergonomic Design Elegant contoured shape seamlessly supports your palm, featuring more flexible and smoother movement, alleviating wrist tension and eliminating wrist joint's fatigue. Cozy comfortable and healthy.Rapid Responsiveness Optical tracking tech. allows higher sensitivity for extra-precise tracking. Upgraded Functionality Previous and next ons for hi-speed web, files browsing and work flow, perfect for gaming enthusiast, programmer, office staff, teen Internet surfer and people who sit at length at computer. Smooth Pads Flat and smooth pad made of special material. Never lose control and abrasive resistance has been improved greatly. Skin-friendly Surface Use rubber oil coating for preventing sweating fingers slide.