Universal Garage Door Monitor #915LM

Lets you know whether your garage door is open or closed.   Signals from inside any room you choose.   Works with all garage doors; with or without a garage door opener.     The small monitor conveniently plugs into any regular socket.   The light flashes red when the door is open; green when the door is closed.     Gives you peace of mind knowing your garage door is closed.   It's a fast, easy installation with no tools required,  and makes a great gift!