Wireless Connectivity: bicycle alarms feature wireless technology allowing remote arming and disarming via a key . Vibration Detection: Incorporates sensitive vibration detection mechanisms that trigger an alarm upon any attempted movement or lifting of the bicycle. Waterproof Design: Ensures the alarm continues to function even in rainy conditions. Battery Life: replaceable batteries, ensuring a long operational time before needing to be eplaced. Adjustable Sensitivity: Allows customization of the sensitivity level to minimize false alarms due to minor vibrations. Decibel Level: The alarm sound can reach high decibel levels (e.g., ≥110dB), making it highly effective at deterring potential thieves and drawing attention to the situation. Installation: These alarms are often easy to install and may attach to the bike frame using secure methods without damaging the bicycle's finish. Input Voltage: DC3V AA battery Static Current: 79uA Alarm Current: 120mA Alarm sound:110dB Working Temperature: -20℃ to +60℃ Working Humidity: ≤90% Note:Please note that for first-time use, the remote controller needs to be added to the host device before setting with any further configurations. Color: Black Material: plastic Package Contents: 1 x alarm 2 x remote controls 2 x cable ties Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.