Liftmaster/Chamberlain myq gateway 828LM for connecting non myq openers such as the 8500 jackshaft model. Requires ethernet connection.
See link for more info on model:
https://overheaddoorparts.ca/products/liftmaster-828lm?variant=29250327806038
7O5.931.6118 If you can still see this ad, the item is still available. Replies that appear like they are auto generated (bot) likely will not be answered.