Ergonomic Design with Multiple Comfort Points The angle and height of the Microsoft Sculpt Wireless Mouse are designed to support a natural hand, wrist, and forearm posture and help reduce pressure that can occur in the carpal tunnel area. A thumb scoop on the mouse also offers aid for correct hand and wrist alignment while working. Multiple Button and Scrolling Navigation Features Four-way scrolling on the seven-button mouse lets you move to the left, right, front, and back of your screen, while the task-specific buttons are designed to help you navigate quickly. A back button takes you to the previously viewed screen, and a Windows button gives you direct access to the Start screen with just one touch. Wireless Capability for Mobile Use The Microsoft Sculpt mouse comes with a wireless connection to your computer so you don't have to worry about cords getting in the way. The 2.4 GHz transceiver offers a wireless range of up to ten feet, and BlueTrack technology lets you track with precision on nearly any rough surface, including carpet.