Intelligent Brake Taillight: The taillights have a brake detection function. When the taillight detects brake deceleration, the taillight switches to brake light mode. The taillights emit strong light. Improve cycling safety. Smart Induction Tail Light: In slow flash mode and breathing light mode, turn on the rear light switch. If you drive in a dark environment, the taillight lights will turn on automatically. Waterproof Taillights: The taillights are IP65 waterproof. On rainy days bad weather, the taillights can be used normally. USB Charging: This is a USB charging taillight. It can be charged via a variety of USB devices. Variety of Installation Methods: The taillightshave 2 installation methods. It can be mounted under the seat. It can also be mounted on the vertical tube. It can be installed in any suitable place.