Kensington Dual Comfort Keyboard Split Keys Ergonomic Bluetooth|USB Wrist RestDescriptionSpecificationsShipping With its split and 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. 4 GHz and Bluetooth 4. 0 LE) with 128 bit AES encryption security; quiet typing; spill proof keys; F keys for shortcuts; caps lock, numbers lock, and scroll lock; a three mode power saving switch;