Tacx Flow...connection options

 Hi all.

Couple of questions on my 1 week old Tacx Flow Smart Trainer.

Firstly, on connection I see 3 options. Tacx Flow BT, Tacx Flow Ant+ and Tacx PWR. I don’t get the FE-C option so I cannot calibrate in-game…should I see it? Secondly, what the hell is Tacx PWR? Same number after the name so are these the same thing? Using a Garmin ANT+ dangle with USB extension.

I also sometimes see a pwr option with a different number ID (no name). It’s firmware updated and I use a Mac to connect with a cadence sensor, HR sensor but no other device. Just wondering what this is all about.