Get peace of mind and added convenience knowing for certain that your garage door is closed. The LiftMaster® 829LM Garage Door Monitor tells you if your garage door is open or closed from any room in your home.
Monitor and close up to four garage doors or gate operators from any room in the house
Green and red LEDs indicate whether the garage door or gate is open or closed
Volume-controlled audible alert lets you know when the garage door or gate is being opened
Fast, easy installation; no tools needed
Signals to any room in the home
Compatible only with LiftMaster® Security+2.0™ garage door openers