Brand: ProtectrixFeatures: No Wiring Required, Installs in minutes Automatically closes your garage door when you forget Delay Times from 1 minute to 4 hours Audible and Visual Alarm before closing your garage door Works with all safety sensors built into the garage door closer Details: Running on a single 9V battery, and using a designed in tilt sensor, Protectrix detects when the garage door is open for too long (variable 1 minute to 4 hours). Protectrix sets off a Beep and a flash. If the garage door is not closed before the alarm ends (30 seconds), Protectrix sends a signal to your garage door opener to close the garage (the signal sent is the same as the signal sent from your garage door remote control). Model SP2 works with Chamberlain Liftmaster and Sears Garage door motors with a red learn button - see models DP2 for purple learn buttons and 18R for all other garage types.
