With its split & sloped keyboard with adjustable reverse tilt & built-in wrist rest, the ergonomist-approved Pro Fit Ergo Wireless Keyboard positions your hands for improved comfort. Features include dual wireless (2.4 GHz & Bluetooth 4.0 LE) with 128-bit AES encryption security; quiet typing; spill-proof keys; F-keys for shortcuts; caps lock, numbers lock, & scroll lock; a three-mode power-saving switch; & a replaceable receiver. In the event the receiver is lost or damaged, simply purchase a new one, pair it with your mouse, & you're all set. Wired / Wireless: Wireless; Maximum Wireless Range: 33 ft; Connector / Port / Interface: Bluetooth; USB; Keyboard Design: Ergonomic.