Garage Door Monitor Add-On Sensor

Garage Door Monitor Add-On Sensor
by Chamberlain
Date first available at Amazon.com: June 18, 2011

1 used & new from $14.95

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CHAMBERLAIN UNIV GARAGE DOORMONITOR ADD-ON DOOR MONITOR ADD-ON

Notifies homeowner if the garage door is open or closed

Signals to any room in the house

Security for the largest door in your house

Fast, easy installation, no tools required