The V2 Master uses a Hans Rudolph mask and differential pressure sensors to measure airflow, and connects to devices like phones or watches for data collection.

“the thing is actually you don't need to plug your nose it actually uses a hand Rudolph mask... they use differential pressure instead to to quantify the flow of what you're doing so basically this is a device that just sits here it's a headgear there's no wires there no nothing it's basically connects to your phone watch whatever that you have”