Remote Control Wireless MTB Bike Bicycle Taillight Turn Signal Light Indicator Installation instructions: First use rubber belt to fixed mount on bicycle tube,then Insert the light into mount. Use rubber band fix the controller on the handlebar. Charging cable please keep. Operation instructions: Press the power button on the tail light in 4-6seconds to check the button light flash. Press and hold the remote control button for 3 seconds to confirm the connection. The middle button on the controller can control the red LED warning light , and the left and right buttons control the Yellow LED direction indicator light on the tail light. Battery and charging instructions: Tail light: Use the built-in 800mAh rechargeable battery,Turn on the back of the tail light rubber charging port cover,insert the Micro plug USB charging cable for charging. When charging,The indicator light is red,after fully the light shows green. Charging time 3 hours,use time 3-4hours. Pay attention to the battery is not allowed to replace by self. Controller: Using a 3v CR2025 lithium battery. The battery cover plate on the back of the controller can be replaced by self. Package: 1* Wireless controller 1* Tail light 1* fixed support 1* USB MICRO charging cable 
