what exactly does the "FDA approved" statement mean? What exactly did they get approved? All features or only the heart rate monitor? What about the ECG?
https://www.wired.com/2016/01/that-slick-devices-fda-stamp-doesnt-mean-what-you-think/
https://www.wired.com/2016/01/that-slick-devices-fda-stamp-doesnt-mean-what-you-think/