✯Highly Sensitivity and Quick Response: This door open alarm responds quickly to any movement of your car door with a loud sound that can catch the attention of other drivers and pedestrians. It is a very practical and convenient device to use. ✯Loud Volume Prompt: The door open alarm will broadcast a prompt voice when your truck or car door is open, so you can hear it clearly and avoid accidents. ✯Small and Beautiful Design: The door open alarm has a small size that does not affect the car or the truck's beauty. It is very beautiful and easy to install. ✯Ensure Reliability and Wide Application: It can help you avoid collision by alerting you and other drivers when your door is open. You can use it for any car or truck, and this door-open alarm is a simple and reliable device that can keep you reliable on the road. ✯Simple Setup: With ABS and electronic components, the door open alarm can be quickly set up on your car or truck door without requiring any change to the original circuit.