Three-in-one Multi-function: The anti-theft alarm system with tail light for bicycle motorcycle is Including intelligent taillight function, parking anti-theft alarm function, bicycle search function. Smart Bicycle Tail Light Function: The warning light will automatically turn on when passing through a tunnel or at night, and the light will be instantly bright when braking lightly or suddenly. In a dark environment, such as when the car stops for more than 30 seconds, it will automatically turn off to save power. It can also be manually adjusted to be always on if necessary. model. Adjustable 3 Ringtones & 7 Levels Sensitivity: The maximum volume can reach 110 decibels, the alarm volume can be adjusted in 3 levels, and the vibration can be adjusted in 7 levels of sensitivity. From light touch to knock alarm, it can be set according to your needs. The remote control distance can reach 229 feet / 70 meters. Just press the remote control to easily find your bicycle or motorcycle in the parking lot. There are three ringtones to choose from. Multi-purpose Vibration Trigger Alarm: The anti-theft tail light alarm with remotes is suitable for bicycles, electric bicycles, motorcycles, scooters, cars, trailers, or indoor door and window alarms, the remote control is automatically paired and easy to use. USB Rechargeable Battery: The rechargeable alarm with tail light is built-in rechargeable 3.7V 700mAh lithium battery, fully charged in about 2~3 hours, can be used continuously for about 3 months, easy to use; built-in button battery in the remote control, about 2 years of daily use. Three installation methods: double-sided adhesive tape, cable ties, bracket installation, compared to the ordinary models on the market, we have added bracket installation, the alarm is not easy to lose.