Universally compatible with ALL garage doors. The Liftmaster 915LM Garage Door Monitor tells you if your garage door is open or closed;security for the largest door in your home.

Liftmaster 915LM Features:

Peace of mind knowing your garage door is closed.

When light flashes red, door is open.

When light is green, door is closed.

Fast, easy installation. No tools needed.

If you have more than one garage door, just add more sensors. (available separately, Liftmaster 916LM) The receiver can monitor up to four doors, flasing a red light whenever a door is open.

Liftmaster 915LM Garage Door Monitor includes: One Garage Door Sensor, One Receiver, One Transformer, One 3V Lithium Battery, Fastening Strip and Instructions

Liftmaster 915LM/916LM Instruction Manual