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 you're ready.