Feature: 1. 5 IN 1 FUNCTION: Intelligent bike tail light, with brake light, turn signal light, warning light, electric bell, and anti theft alarm, provide comprehensive reminders to pedestrians and vehicles, ensuring safe riding. 2. 6 LIGHTING MODES: Built in 31 high brightness COB LEDs, with a brightness of 160LM and a 200 degree wide angle design, with 6 adjustable lighting modes of slow flashing, breathing, fast flashing, constant on, emergency light, and off. 3. TURN SIGNAL LIGHT: Before turning, easily press the RL button on the remote control (which can be clipped onto the handlebar), and the turn signal lights will flash and make a clicking sound. 4. 2 SECOND HIGHLIGHT: Once you brake, the taillight will automatically highlight for 2s, reminding the driver behind you to avoid rear end collisions and traffic accidents (only in slow flashing, breathing, fast flashing, and constant on modes). 5. BUILT IN BATTERY: The host is equipped with a built in 1500mAh lithium battery, and the remote control is equipped with a 150mAh button cell, with USB charging to ensure long term endurance. 6. 7 LEVELS SENSITIVITY: The smart bike alarm triggered by vibration can help effectively prevent thieves, providing additional security, with 7 levels sensitivity adjustment, which is convenient and practical. 7. OTHER FUNCTIONS: This smart taillight supports wireless remote control, with a wireless range of 30 to 60 meters, with IP65 waterproof grade, which can be used in various adverse weather conditions. Specification: Item Type: Smart Bike Taillight Host Model: KS SF31 Remote Control Model: WL02C USB Charging Port: Standard USB C 5V Host Battery: 1 x 3.7V lithium battery 1500mAh (built in battery) Remote Control Battery: 1 x 3V CR2032 button cell 150mAh (built in battery) Waterproof Grade: IP65 Working Frequency: 433.92MHz Wireless Range: Approx. 30-60 meter / 98.4-196.9ft Working Temperature: -40-70℃ Working Humidity: <80% Storage Temperature: -40-70℃ 5 In 1 Function: Super bright bike taillight (with 6 lighting modes) bike turn signal light (with clicking sound) Car brake lights Anti theft vibration alarm (7 adjustable sensitivities) 110dB bike horn with 3 speaker tones Product Features: 6 Lighting Modes: Slow flashing, breathing, fast flashing, constant on, emergency light, off Intelligent automatic light on and off mode Wireless control with slow flashing and breathing button locking function (up to 8 remote controls can be added) IP54 waterproof, high and low temperature resistant USB C type rechargeable (with charging level indicator) Long battery life (using energy saving technology) Low battery indicator light. Package List: 1 x Alarm1 x Remote Control1 x Data Cable ( Not Include Charging Adapter)1 x User Manual12 x Accessories1 x Hex Wrench1 x Remote Control Keychain2 x Taillight Mounting Brackets2 x Remote Control Installation Brackets1 x Non Slip Pad