Foobart,
Welcome to the forum!
"Two Way Audio" implies full duplex. But what's supported is half duplex. You switch the audio link from "Listen" to "talk", then back to "listen" again. While you're talking, you're not receiving audio.
nayr hits the nail on the head - it's not a VOIP solution, or even like a POTS connection.
Recording audio legally varies greatly, town to town, state to state. I'm in a state that supports "implied consent". I put a sign on my driveway that informs folks I'm recording audio. If they continue up the driveway, that's implied consent.
@cosmo asked: "Was I using the correct method to communicate etc."
I believe most PM Andy from here, as vs going straight to the web store. (PM is called "Conversation" in the forum's UI)
I sent my first PM to him an hour ago, so I speak from my readings on the forum (and not from personal experience)
Fastb