High volume electric bicycle hornThe maximum sound of the bicycle speaker reaches 120 decibels. When riding in a noisy environment, complex road conditions are prone to collisions. This oversized horn sound is loud enough to effectively alert surrounding pedestrians and drivers to avoid traffic accidents.Anti-theft alarmLong press the left button (lock button) to enter the alert state. If someone touches or pushes the bike, the bike alarm will immediately emit a loud and continuous alarm sound, so that thieves do not dare to approach. Press the right button (unlock button) for a long time to exit the anti-theft state.Long standby time Electric bike horn alarm, the capacity of the built-in horn is 250 mAh. It can be fully charged in 0.5 hours, can be reused 1000-1500 times and work for 20-30 days. One charge can be used for a long time, you don"t have to worry about running out of power the next time you useIPX4 waterproof and USB charging The bike bell is waterproof and can be used on rainy days. The electric bike horn alarm adopts USB charging and can be charged in different ways, such as plugs, power banks and laptops.Easy installation The bell does not need to be installed with complicated tools, just attach the silicone bicycle horn alarm strap to the handle, and the strap is elastic and durable. This bell is suitable for bicycle handlebars with a diameter of 22.2 to 31.8 mm, which can be applied to mountain bikes/electric scooters/racing cars, etc.