Just got one of these and wanted to create a proper handler for it. I have been using a Philio Pan04 in one room of my house for a while (which has been great), but didn’t like the ~1 second delay when pressing the physical switch (all my other switches are instant and I am a perfectionist).
I am not a huge fan of this device because 1) It’s a tad larger than other dual relays, and 2) Its terminals did not fit my 14 gauge lighting wire. I expected this from the 3v switch terminals, but not the line, load, and neutral terminals. I had to squish the wire just a tad to get the terminal screws to thread.
Anyway, here is the device handler for it. It has some configuration options to fine tune things (if that is how you roll).
And of course, to use both switches in automations and such, don’t forget to use my Physical / Virtual device sync: