The advanced design of Sculpt Ergonomic Mouse maximizes wrist comfort while making navigation effortless. Shaped to encourage a more natural hand, wrist, and forearm posture, Sculpt Ergonomic Mouse helps prevent the pain of repetitive stress injuries. 1.Advanced Ergonomic Design Advanced ergonomic design encourages natural hand and wrist postures 2.Mouse angle and height Mouse angle and height are designed to place wrist in a comfortable position and reduce pressure on carpal tunnel area 3.Thumb scoop Thumb scoop helps to maintain the correct ergonomic hand and wrist position 4.Windows button Windows button for one-touch access ot the Start screen 5.Back button Back button for faster navigation 6.Four-Way Scrolling Scroll left, right, front and back. Quickly navigate all of your projects with speed and efficiency.