Garage Door Monitor

The Garage Door Monitor is an easy, reliable way to know the garage door is closed. Install the wireless sensor on the door using the hook-and-loop tape (included) and plug the indoor receiver into any AC outlet. When the receiver's LED is red, the door is open. When it's green, the door is closed. Works with any garage door. Monitor up to 4 doors using additional sensors (see below). Batteries included.