Did you remember to close the garage door ?
works on all garage doors

Garage door Monitor Works on any garage door Battery powered Sensor attaches to your door, Then plug monitor into any 110 volt outlet inside house. If door is closed light will be green if door is open light will flash red. very easy to install no wiring involved no tools needed. Includes one monitor and one sensors see 916lm for additional sensors if you have more than one door.