How to Install the Bike Taillight and Remote Control? 1. Install the Taillight on the Bike Pipe 2. Install the tail light holder on the seat tube and use a screwdriver to tighten the screw. 3. Insert the taillight into the tail light holder. 4. Install the Taillight under the Bike Saddle 5. Insert the taillight into the mounting bracket, put screws through the hole, and put them under the bike saddle. 6. Install the Remote Control on the Handlebar 7. Use the rubber band to fix the remote control on the handlebar How to turn off this Ambient Light Detection function if you don't need it? Method 1: Please cover the sensor at the bottom of the bike taillight with black tape. Method 2: Please long-press the power button on the taillight for 3s when charging till a group of LED lights in the middle of the taillight flashes. After repeating the step, this function will be turned on again.