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Title: It's a garage door opener.
Review: It opens and closes the garage door. I have installed it instead of a much older Chamberlain model, reusing the rail and chain and it worked just fine.I do not like that beam safety thing, I did fine without it for all those years, and it annoyed me that I found no way to turn it off. I had to glue the sensors to the opener support beam, facing each other, so that it operates.
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