Your keyboard can be paired with up to three different computers using the Easy-Switch button to change the channel.
Select the channel you want and press and hold the Easy-Switch button for three seconds. This will put the keyboard in discoverable mode so that it can be seen by your computer. The LED will start blinking quickly. Open the Bluetooth settings on your computer to complete the pairing. Once paired, a short press on the Easy-Switch button will allow you to switch channels.