Features: Ensure the safety of your electric bike with our high efficiency anti theft alarm system, featuring a powerful built in siren that activates instantly upon unauthorized contact, effectively deterring potential thieves. This user friendly alarm is designed for easy installation without the need for specializes tools, and offers Double alert modes including audible and remote notifications, making it adaptable to various security needs. Ideal for electric bike owners, students commuting to school, Professional relying on e bikes for daily travel, and seniors seeking additional protection for their vehicles. Perfect for urban parking in public spaces, residential communities, or during outdoor activities like cycling tours, providing enhanced security even in remote or low traffic areas. With its waterproof design and energy efficient technology, this ABS constructed alarm ensures reliable Performances in weather conditions while offering customizable alert tones for a personalizes experience. Specifications: Material: ABS Size: about 24x35x55mm/0.94x1.38x2.17inch 37x61mm/1.46x2.4inch Package Includes: 1 set Electric Bike Alarm note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the difference between different monitors, the picture may not reflect the actual color of the item.