Works very well. It is loud and if anyone moves my car door or opens it will go off. It also went off when I shut my other doors and shook the car hard. I tested to see if it goes off if I lean on the door or near it and it didn’t, so it is not likely to have that many false alarms. If anyone tries to harm your car or break in, they will need more force that just a simple lean or tap. Instructions in English and not too difficult to figure out. Going to buy this for my home door. Would give it five stars if it was more sensitive and loud but t will do the trick and is great for the money
Loud, it works good price, false alarms not likely