Liftmaster 829LM Garage Door Monitor

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With the Liftmaster 829LM you won't have to go downstairs or outside to see if you accidentally left the garage door open. With the LiftMaster® Garage Door Monitor, you can check and close the garage door from any room in the house.•MyQ™ enabled technology allows you to 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•Compatible only with LiftMaster® Security+2.0™ garage door openers