Description

829LM Garage Door Monitor

Get the peace of mind of 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 from any room in the house
  • Green and red LEDs indicate whether the garage door is open or closed
  • Volume-controlled audible alert lets you know when the garage door 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