According to the Adinstruments Equivital data sheet: https://m-cdn.adinstruments.com/brochures/ADINSTRUMENTS_EQUIVITAL_BROCHURE.pdf the Equivital has noise and movement artifact-free ECG, but only 2 Channel ECG. The Polar H10 also has 2 Channel ECG, therefore, the Adinstruments Equivital is probably not more accurate than a Polar H10. We suppose that the Adinstruments Equivital has a lower accuracy than a 16 …