Everyone wants a safe home for their family. Door Alarms are a form of motion detector which will notify you when someone comes to your door and tries to get in. Now you won’t wonder if you heard something in the middle of the night. The door alarm will sound a very loud alarm so there will be no doubt that someone is trying to get in. As long as you know that it’s not your teenager trying to sneak in at 2 am, then it’s time to call 911.