It says here that it works with Liftmaster drives with a red programming button, but it doesn't work with all Liftmaster drives with a red programming button. I have a Liftmaster 371LM with a red programming button and it doesn't work. However, a similar item advertised for "purple" button openers and "Liftmaster 371LM" openers worked for me. So if you have a Liftmaster 371LM opener with a red learn button, you may have better luck with the version of this item that comes with "purple" learn buttons but says 371LM.
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