I have O2 or oxygen heart monitor it checks your heart rate and oxygen levels in your blood stream. Healthy individual should have blood O2 level of 95% and above. I bought it with free diving and breath holding exercises…
I have O2 or oxygen heart monitor it checks your heart rate and oxygen levels in your blood stream. Healthy individual should have blood O2 level of 95% and above. I bought it with free diving and breath holding exercises…