LiftMaster Garage Door Monitor 915LM

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.

One 915LM monitor
One 916LM sensor
One Transformer
One 3V Lithium Battery
Instructions

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

Works with any garage door

7 Quick Tips for Buying Garage Door Opener Parts

You will need to know several details about your garage door opener to select the correct parts for it. Manufacturer name and model number are usually necessary.
To find detailed infomation about your garage door opener, look on the garage door opener power head located on the ceiling of your garage. Usually stickers and identifying information are found on the back or sides of the machine.
Garage door opener manufacturers change the frequency at which remote controls and keypads function periodically, so you will generally need to know the model number of your garage door opener.
Some models of garage door operators use radio gear (remote controls, keypads) from another manufacturer. In this case, you will need to know additional details found on a currently working remote control.
Use our Garage Door Opener Selection Guide for details specific to your brand of garage door opener.
On each product page there is a section called "Compatible with". This section gives details on manufacturers and models numbers that use the particular garage door opener part, remote control, keypad, gear, or other part.
If you are still not sure which part will work with your garage door opener, Contact Us using the web form on the contact us page. Please include details about your garage door opener manufacturer and model number in your question.

Customer Reviews

Average Rating

	Best and Inexpensive Sense of Security!
	We bought the Garage Door Monitor, and installed it on both garage doors. It is amazing how many times, in the past, that we would find the door open when we thought we had shut it. It is scary to think we went all night long with the door open! We realize that sometimes we would close the door but it would hit something and open up without us knowing. Or, our remote key chain opener would get bumped and the door would open without us knowing. The sensor just attaches to the door and senses if it is not in a verical position, and a red or green light is displayed on the monitor inside the house. WE ABSOLUTELY LOVE IT!!! Our neighbors across the street often leave their door open and we are always calling to tell them. So, we bought one for them as a gift and they are equally thrilled!!!! It takes but a few minutes to install, and gives the best 'piece of mind'!
	Reviewed by: B. from USA. on 3/24/2011

	Great Product!
	I had initially looked at the Skylink garage door indicator, but poor reviews made me look a little harder for another alternative. The LiftMaster is it. Instead of a magnetic push switch which is used on the Skylink, the LiftMaster uses a gravity switch to indicate the door is open or shut. Basically, when the sensor goes from vertical to horizontal, it sends a signal to the receiver to illuminate a red blinking light. We placed the receiver (AC powered) in our bedroom and it receives the door signals (CR2032 battery each) very well (about 200 feet through two walls). The receiver will not be able to differentiate between two different doors, but all I really need to know is if either is open...I could care less which one. The receiver comes with one transmitter and is significantly less expensive than it's Skylink competitor. Additional receivers are also significantly less expensive. If you have ever left your garage door open all night and woke up to missing bicycles or mowers, then this is the product for you. My kids are always telling me the status of our garage doors now. This is a great product.
	Reviewed by: Courtney P. from Hooper, UT. on 3/24/2011