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. Thumb scoop helps to maintain the correct ergonomic hand and wrist 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 Separate number pad provides greater flexibility for workspace setup. Required Hard Drive Space:150 MB Hard Drive Includes Keyboard, Mouse, Number Pad, 2 x AAA Batteries, Bluetooth USB module. Compatible-Win 10 64 bit, Win 10 32 bit, Win 8.1 32 bit, Win 8.1 64 bit, Win 8 32 bit, Win 8 64 bit, Win RT 8.1, Win RT 8