How do I switch on the microphone on the Open Swim Pro? I have now used my Open Swim Pro several times, on the bike and on the lake. The sound is good and they are waterproof, as promised. But I was also planning to make phone calls on the bike and that hasn't worked so far. I don't see any relevant settings in the app. If I connect the headphones to my computer, they only appear as audio-out, not as a microphone. The Open Swim Pro page states: "The microphones' breathable membrane, along with the innovative layered design safeguard against sweat and splashes." https://uk.shokz.com/products/openswim-pro So it should be possible somehow.