Do you worry about opening your car door in traffic and causing accidents? Do you want a simple and effective device that can alert you and others of your door status? If so, you need the Door Open Alarm! The Door Open Alarm is a smart gadget that attaches to your car door and emits a loud sound when it detects that the door is open. It has a quick response time and a long battery life. It does not affect the normal operation of your car door or window. It is easy to install and remove. The Door Open Alarm can help you ensure safety for yourself and others on the road. It can prevent collisions, injuries, and fines. It can also deter thieves and vandals from breaking into your car. Don't wait any longer. Order the Door Open Alarm today and enjoy peace of mind every time you open your car door! Specification: Size: about 5.6*2.7*0.8cm|2.2*1.06*0.31 inches Material: ABS+electronic components Color: Black Packing List: Door Alarm Sensor*1 See more product details 1.Easy Installation: The door open alarm is made of ABS material and electronic components, which can be easily installed on any car or truck door without changing the original circuit. 2.Practical and Convenient Device: This door open alarm has a loud sound that can alert other drivers and pedestrians when you open your car door. Because it has a built-in sensor with high sensitivity and quick response, it is a very convenient and practical device to use. 3.Prompt Voice Broadcast: Because the door open alarm broadcasts a loud prompt voice when your truck or car door is open, you can hear it easily and stay safe. The door-open alarm is your reliable helper. 4.Small Size and Beauty: Easy to install and very beautiful, the door open alarm does not affect the car or the truck's appearance. It is a small and convenient device that enhances your safety. 5.Ensure Safety 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 safe on the road.