The Firefly 390LMD21K garage door opener makes it easy to keep your remote within reach at all times. This Firefly transmitter comes on a sturdy clip-on keychain that you can keep on your house keys, your car keys or attached to your pocket or purse. Simply click the single button to open or close your garage door swiftly and smoothly.
The Firefly 390LMD21K garage door remote works with any LiftMaster receiver or transmitter, and is considered a generic version of the 61LM. To find out more about this great product, use the "Questions" feature below to get answers from our staff and other customers who own the product.
New Part# 390LMD21K3
Alternate Part# TRACOMFIR611K
Capable of replacing Remote Models 81LM, 51LM, 750CB, and 850CB.
Keychain features a simple clip-on style
LED lights up when testing or operating the remote
Blue case features smooth, rounded corners
Frequency of 390 MHz
9 dip switches are located in the back battery compartment
One 12V battery required
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QUESTION: Does it work with a purple smart button? by None N 1/2/2017
STAFF ANSWER: no by Taylor M a
ANSWER: I don't know! by Laura K a
QUESTION: I have a Liftmaster garage opener with a purple smart button. Will this work or what one will? I need a small keychain type. by Travis G 3/24/2016
STAFF ANSWER: Travis you will need to the 890 Max by Taylor M a
QUESTION: How do u program this for a liftmaster? by None N 2/13/2016
STAFF ANSWER: <a href="https://sep.yimg.com/ty/cdn/yhst-16416632405890/TS-Firefly-390LMD21K.pdf?t=1574372400_ga=1.25171517.1472442495.1453813845" target="_blank">http://lib.store.yahoo.net/lib/yhst-16416632405890/TS-Firefly-390LMD21K.pdf#_ga=1.25171517.1472442495.1453813845</a> by Taylor M a
QUESTION: I currently am using a remote in my car, model 111663-3901. It has 9 dips. I want to have a remote that I can have in pocket. Will this remote work on my Overhead door as my current remote? by Stephen P 1/16/2016