Model # GM-318

Internet # 203076041

Garage Door Monitor Kit

This item has been discontinued.
The Home Depot no longer carries this specific product.



Model # GM-318

Internet # 203076041

Garage door monitor set comes with the garage door sensor which attaches to the garage door and the receiver. This will notify you when the garage door is opened with a flashing light and an audible beep. This unit monitors the sensors and the battery condition automatically. This receiver can work with up to 4 sensors (additional sensors sold separately).

  • Garage door monitor set
  • Supervised sensor
  • Good operating range
  • Easy to set up
  • Audio and visual indicators
  • Package contents: GM-318R, AC/DC Adapter, GM-318T, lithium battery, user instructions

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Batteries Included 
Battery Type Required 
3-v Lithium 
Doors Operated by Remote 
Garage Door Part/Accessory Type 
Garage Door Monitor 
Garage Opener Device Type 
Illuminated buttons/display 
Model/year compatibility 
Motion detecting 
Number of Batteries Required 
Power Source 
Product Weight (lb.) 
.75 lb 
Rolling code technology 
Universal control 
Wired or Wireless 
Warranty / Certifications
Manufacturer Warranty 
1 Year 


Garage Door Part/Accessory Type: Garage Door Monitor
Garage Opener Device Type: Monitor
Brand: SkyLink
Review Rating: 3 & Up
1 Question1 Answer

Customer Questions & Answers

Garage Door Monitor Kit
Garage Door Monitor Kit

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1 answer

How far apart can the sensor and receiver be from each other?

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August 17, 2015
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August 18, 2015
The receiver and sensor must be within 10 feet of each other.
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Rated 3.5 out of 5 by 11 reviewers.
Rated 5.0 out of 5.0 by Fast Delivery Time & Excellent Item I am very pleased with Home Depot's service, using their mail delivery. For the Handicapped and those with busy schedules, this service is one that is really appreciated. Thanks Home Depot for providing me with a very use full Garage Door Monitor Kit. June 2, 2015
Rated 5.0 out of 5.0 by Easy to install. Works great. The garage door monitor kit was easy to install. Ensured the sensor and monitor settings were identical; attached the sensor to the garage door so the sensor arm extends fully when the door opens; placed the monitor in a visible location in the house; and, plugged it in. A green light on the monitor tells me the door is closed. If the door is opened, a red light comes on, and an audible alarm sounds (which can be muted if you intend to have the door open for a prolonged period of time). My monitor is next to my house alarm panel so I can tell at a glance if everything is buttoned up (and the garage door is closed) when I turn the house alarm on. April 3, 2012
Rated 5.0 out of 5.0 by GARAGE DOOR MONITOR KIT GARAGE DOOR MONITOR KIT All aspects of this purchase were positive January 10, 2015
Rated 4.0 out of 5.0 by Works with limits Just have to keep sensor and transmitter no further than 10 ft apart. December 9, 2014
Rated 5.0 out of 5.0 by very good purchase Good design ,price----recommend it to anyone looking for an easy way to monitor garage door status August 12, 2014
Rated 1.0 out of 5.0 by not worth it bought 2 of these they have not worked since I install them. May 1, 2014
Rated 4.0 out of 5.0 by Good Value This product is very easy to install and works as it should. If garage door is open, the monitor beeps until it is fully closed. This can be a little annoying, but it gives much needed piece of mind that your garage is secure as far as the large door is concerned.. December 11, 2013
Rated 1.0 out of 5.0 by nuisance this thing works well, but is a nuisance. the audible alert is constant every time the door is opened. other brands are intermittent. who wants a loud alarm the entire time the door is open? I know it can be muted, but shouldn't have to do that. I returned it. June 30, 2013
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