No instructions

I bought this on a whim... and now wish I hadnt.
There are no instructions, no "info" button in the app. No FAQ -- nothing that I can find.
From the cryptic "help" Ive received from the email "support", Ive learned that the "Walkie Talkie Pro" works only within Bluetooth range or the range of the local WiFi router. And for that to work. any other person wanting to participate has to have the same app.
Im told it wont work over the internet. Theres a "conference" feature thats "enabled", but no instruction on how to use it.
Theres no link on the "support" page -- just an email address. The responses Ive gotten there have been minimal and havent addressed all my questions. The one positive thing: replies have been reasonably prompt.
I cant give this just one star -- for all I know, it might actually work. But it suffers greatly from a lack of information. If youre thinking of buying, I suggest contacting the Support person if you have any questions about what the app does and how it works... and hope you get a useful reply.

RadioDood about Walkie Talkie Pro