Presumably HN mods resubmitted this through the second chance pool (which treats an older submission and its comments as if they are new, but in some places that magic leaks ;))
I'm not sure if it will work in other recorders. I wrote them an email asking if the remote is compatible with various models. I'll post their answer in the GitHub repo (https://github.com/mattogodoy/h6/issues/1) as soon as they write back.