God guards the guarded

Why do you need an alarm for doors and windows?
It's always a little protection, it's a quieter sleep and relaxation during a lonely stay at home. Every door and window opening will be signaled by an alarm . With a child under your care, you can safely leave the room by closing the door behind you, as soon as the toddler leaves the room you will know about it. But so alarm it's not just a home solution, it's also alarm for each store , wholesalers or magazines. Far away from the door you will be busy with something else informed by sound about an incoming customer. This is not a lot of money, simple and easy installation, and what a great simplification in everyday life.