This bike alarm comes with a mounting bracket, adjustable ring size, more stable on your bike, no probability of falling, and easy to change the installation position Effectively deter thieves Up to 113dB loud alarm, 3 adjustable volume levers, no worry about the alarm being extremely loud or not loud 7 adjustable sensitivity levels from soft touch to push or beat. IP55 waterproof, suitable for outdoor use Vehicle search function, easy to find your vehicles in the parking lot, 3 types of bells to choose from, wireless control by remote control, loud wireless range up to 20m Vibration triggered alarm suitable for bicycles, e-bikes, motorcycles, scooters, cars, trailers, luggage, doors and windows. Size: Approx. 95*32mm Color: Black Quantity: 1 set of 2 pieces