The YHE BP Doctor is a new smartwatch that can measure blood pressure, along with oxygen saturation levels and heart rate variability. All this functionality should make the YHE BP Doctor capable of providing important information about your own health.
https://www.notebookcheck.net/YHE-BP-Doctor-A-new-AMOLED-smartwatch-that-measures-blood-pressure-oxygen-saturation-and-heart-rate-variability.453783.0.html