✅ HIGH SECURITY: Police bike siren wireless vibration sensor is designed for protection of bike, E-bike, motorcycle, electric bicycle, electric scooter and more. Will effectively scare away thief's generating loud alarm when thief wants to steal it. ✅ EXTREMELY LOUD 113dB: Police bike alarm with remote is one of the loudest alarms on the market delivering up to 113dB. Can be heard at a long distance to draw peoples attention and effectively scare the thieves away. Has 3 levels adjustable volume and 7 levels adjustable sensitivity easily set according to your needs. ✅ EASY TO INSTALL: Two install methods, Double-sided sticker or tie it with a strap. IP55 waterproof. ✅ REMOVE CONTROL WITH SEARCH FUNCTION: Easy to search your bike or scooter outside within a certain distance, alarm will sound when you press the ringtone key. Wireless range up to 66ft. ✅ SOS FUNCTION: In case of accidental fall bike security alarm SOS function will detect an accident if the bike is tilted more than 45° from its original position, and then make a beeping sound to signal for help. ✅ LOW BATTERY INDICATOR: Please replace batteries if you notice the LED indicator goes dark or wireless range becomes shorter. POLICE - Be Safe!