1. Install the batteries into the BC30 light. Test the light with the main switch to ensure the light itself works properly.
2. Use a coin to unscrew the back of the remote switch
3. Install the coin battery with its larger side (the side with + mark) facing up. Make sure the small clamp on the edge is holding the battery.
4. Fully tighten the battery cap
5. Press and hold down the switch on the main bike light for 5 seconds. Does the switch flash red and green alternatively now?
6. Click any of the buttons on the remote switch to pair the remote to the main light.
7 Turn on the light by using the switch on the main light. Now use the remote switch to turn on/off and adjust the brightness. (The main light has to be activated first before you use the remote switch.)