915LM Garage Door Monitor

No more getting out of bed and stumbling downstairs to check if the garage door is closed. The LiftMaster® Garage Door Monitor tells you if your garage door is open or closed from any room in your home. That's convenient, dependable security – and peace-of-mind – for the largest door to your home.

• Works with any garage door
• Monitors up to 4 garage doors (with additional sensors)
• When light flashes red, door is open