Probably not recording - just reading volume from a microphone and transmitting a "level". That's more plausible because it is simpler to code, requires less u

Probably not recording - just reading volume from a microphone and transmitting a "level". That's more plausible because it is simpler to code, requires less upstream bandwidth, and tallies with their "We can't record" statement. Of course it would be easy to build something like this yourself, if you fancied a challenge. A mic-input, an ESP8266 chip, and you've got yourself an instructibles-project!