Wireless Bluetooth 5.0 & RF connection (Bluetooth receiver not included, Nano sized RF receiver included) RF receiver is stored in the base of the keyboard Upto 10M of Bluetooth or RF wireless freedom Powered via 2 x AAA batteries (not included) Multi Device pairing, with 2 Bluetooth devices and 1 RF device (eg. PC, Tablet, Phone) 3 Multi Device pairing keys offer fast hot swapping between 2 paired Bluetooth & 1 RF devices Large 1 inch square keys (24mm) Black case with modern gloss piano black beveled edge Same outer size as a conventional keyboard Detachable wrist pad for comfortable typing Various key colour options available: High Contrast white keys with large UPPERCASE black font designed for maximum contrast Other options also available: Mixed Colour keys with large lowercase OR UPPERCASE font and keys grouped in different colours making learning easy and fun High Visibility yellow keys with large UPPERCASE black font designed for maximum visibility Easy to learn text written on