You need to pair devices when powering up Parrot Rhythm n'Blue for the first time. Subsequently, all connections between your phone and Rhythm n'Blue are automatically established when both devices are within a few meters range of each other.
Procedure
From your phone, select the MAIN MENU and select the BLUETOOTH icon.
Turn on the Bluetooth by clicking in the button on the left and bottom of the screen
Activate the SEARCH button, and Wait.
Select your Rhythm n'Blue kit.
Enter 1234 as Bluetooth PIN code, and click OK (connecting).
Then come back to the device List and select your Rhythm n'Blue kit.