Chamberlain MYQ AGDMEV-01 Garage Door Monitor Be certain that the garage door is closed when it is supposed to be from anywhere in your home No need to go to the garage to close the door - simply press the close door button on the unit The red light is illuminated whenever the garage door is left open and the Green light illuminates to let you know that the door is closed Works only with myq enabled chamberlain garage door Openers No installation required, simply plug the unit into any outlet in your home and its ready to use