With its split & sloped keyboard with adjustable reverse tilt and built-in wrist rest the ergonomist-approved Pro Fit Ergo Wireless Keyboard positions your hands for improved comfort. Features include dual wireless (2.4GHz and Bluetooth 4.0 LE) with 128-bit AES encryption quiet typing spill-proof keys F-keys for shortcuts caps lock numbers lock & scroll lock a three-mode power-saving switch and a replaceable receiver*. * In the event the receiver is lost or damaged simply purchase a new one pair it with your mouse and youre ready.Ergonomist-approved designPositions your hand for improved comfort.Split and sloped keyboard with adjustable reverse tiltPositions hands wrists and forearms for comfort and neutral alignment.Built-in wrist restSupports cushions and cradles the wrists.Dual wireless with 128-bit AES encryptionThe flexibility of 2.4 GHz and Bluetooth 4.0 LE with government-grade encryption.Quiet keysFor smooth easy non-disruptive typing.Spill-proof keysMake clean-up fast and easy.Replaceable receiverIf your receiver is ever lost or damaged simply purchase a new one pair it with your mouse and youre ready.Three-mode power-saving switchAllows you to toggle between 2.4GHz Bluetooth and Off for best battery life.Caps lock numbers lock scroll lock and F-keysPopular features that make typing and navigating easier and more efficient.