1. Product information: - Color: Black - Applicable scope: Bicycle windows - Operating voltage: 4.5 (V) - Volume ≥: 113 (dB) - Operating current: 10 (mA) - Type: Anti - loss device - Packaging list: 1 * Remote control, 1 * Anti - loss device, 1 * Screwdriver, 3 * AA batteries 2. Ideal uses: Suitable for bicycles, cars, motorcycles, electric bicycles, self - balancing scooters, doors and windows. 3. General alarm: Mainly used as an anti - theft alarm. 4. Extremely loud: Emits an extremely loud 113 dB alarm when activated. It has a strong deterrent effect and can effectively prevent bicycle thieves. 5. Waterproof: With a waterproof rating of up to IP55, it can be used outdoors. 6. Adjustable sensitivity: There are 7 sensitivity levels to choose from, corresponding to 7 tones respectively. Do is the highest and preset sensitivity level.