The Smart Bike Tail Light Alarm is a three-in-one multi-function device designed to enhance the security and visibility of your bicycle or motorcycle. It combines an intelligent taillight function, a parking anti-theft alarm function, and a bicycle search function. The intelligent taillight function ensures that the warning light automatically turns on when passing through a tunnel or at night. It also instantly brightens when you brake lightly or suddenly. In dark environments, such as when the vehicle stops for more than 30 seconds, the light will automatically turn off to save power. If needed, you can manually adjust it to be always on. The tail light is adjustable and can be set according to your preferences. The alarm system features adjustable ringtones and sensitivity levels. With a maximum volume of 110 decibels, you can choose from three different ringtones. The vibration sensitivity can be adjusted in seven levels, allowing you to set it from a light touch to a knock alarm. The remote control has a range of up to 229 feet (70 meters), making it easy to locate your bicycle or motorcycle in a parking lot. This multi-purpose vibration trigger alarm is suitable for bicycles, electric bicycles, motorcycles, scooters, cars, trailers, and can even be used as an indoor door and window alarm. The remote control is automatically paired and easy to use. The device is powered by a built-in rechargeable 3.7V 700mAh lithium battery, which can be fully charged in about 2-3 hours and provides approximately 3 months of continuous use. The remote control uses a button battery that lasts for about 2 years of daily use. The alarm can be installed using double-sided adhesive tape, cable ties, or a bracket for added security. Key Features: Three-in-one multi-function device Intelligent taillight function for enhanced visibility Adjustable ringtones and sensitivity levels Remote control with a range of up to 229 feet (70 meters) Suitable for various vehicles and can be used as an indoor alarm Built-in rechargeable battery with long-lasting power Multiple installation methods for added security