Anti-theft alarm for bicycle with a sound level of up to 110 dB, which effectively scares away potential thieves and attracts the attention of others. The bicycle alarm has 7 adjustable sensitivity levels that can be easily set with the remote control according to your needs. The support protection alarm can be used for bicycles, motorcycles, electric scooters and more. Specifications: Material: PC Size: 4.6x7.5x3.5+3.3x6.1x1.2 cm Sound level: 110 dB 7 adjustable sensitivity levels Waterproof: IP65 Power supply: USB rechargeable Alarm battery: 4 pcs 2V 700mA rechargeable lithium battery Remote control battery: 12V 27A battery Operating time rechargeable battery: 1-3 months Alarm battery standby time: 6 months Charging port (alarm): USB-C 5V (some fast chargers may not be compatible) WL03C: 27A 12V Alkaline battery life: 1-2 years (when used 5 times a day) Remote control battery WL09C: CR2032/button cell battery Battery life: 2-4 years, working frequency: 433 92MHZ Working temperature: -40-70 ℃ Humidity: Adjustable sensitivity IP65 waterproof High alarm sound For bicycle/motorcycle/electric scooter etc._CA