This applies to the R1 and X1 series of Cycling helmets
1. Turn on your helmet and the RC4.
2. Press the helmet's Center Button for 10 seconds to enter the configuration menu. Tap the (+) Button or the (-) Button until you hear a voice prompt saying, "Remote control pairing". Press the Center Button to enter into Remote Control Pairing mode and the red LED will flash rapidly and you will hear multiple beeps.
3. On the RC4, press the (+) Button for 8 seconds until its LED flashes red. The helmet will automatically perform pairing with the RC4 in pairing mode. You will hear a voice prompt, "Remote control connected" when they are successfully connected.