The Sculpt Ergonomic Desktop is built on advanced ergonomic principles, with a split keyboard layout that keeps wrists and forearms in a relaxed position, and a cushioned palm rest to provide wrist support. The domed keyboard shape works to reduce and correct wrist pronation that can cause pain and limited mobility. The natural arc key layout mimics the curved shape of the finger tips with a windows button for one-touch access to the start screen, while the separate number pad provides greater flexibility for workspace setup. Incorporated into the mouse is a thumb scoop which helps to maintain the correct ergonomic hand and wrist position. AAA (included). Manufacturers 3 year limited hardware guarantee.