Pair The Keyboard With A Device; Windows Os, Android Os, Chrome Os - Logitech K480 Manual

Pull the tab from the battery compartment to power on the keyboard.
(Out of the box, the keyboard's On/Off switch is in the On position.)

PAIR THE KEYBOARD WITH A DEVICE

On the keyboard
Select a Bluetooth wireless channel.
Turn the selector dial to 1 (the factory setting).

Windows OS, Android OS, Chrome OS

To connect to a computer or mobile device running Windows, Android, or Chrome:
Press and hold down the "pc" connect button for 3 seconds.