Microsoft - Sculpt Ergonomic Wireless Desktop Keyboard Mouse - L5V-00001 NO USB RECEIVER Cushioned palm rest provides support and promotes a neutral wrist position. This keyboard features Advanced Encryption Standard (AES) technology, which is designed to help protect your information by encrypting your keystrokes. Dimensions for Mouse -Length-3.87 inch. Width-3.13 inch Split keyset design helps to position wrists and forearms in a natural, relaxed position. Natural Arc key layout mimics the curved shape of the finger tips. Domed keyboard design Domed keyboard design positions wrists at a natural, relaxed angle. Separate number pad provides greater flexibility for workspace setup.