I bought the "M1 ring" as a replacement for my "pulse oximeter".
The heart rate measurement is sufficiently accurate but takes approx. 1 minute! The sleep analysis surprised me positively.
The SPo2 measurement only recognises the values 96% to 98% regardless of whether I am wearing the ring or not!!! It doesn't matter how I wear the ring, it is always the same 3 values although my oxygen saturation is actually 10% to 15% lower!!! The red LED is activated when SPo2 measuring, but the values are fake or something needs to be done to the ring. If you don't need a real SPo2 measurement, you have a very inexpensive and stylish smart-ring. However, I need real SPo2 values quickly.
Der M1 ist ein ab sofort erhältlicher, smarter Ring - der zu einem besonders günstigen Preis an den Start geht. Das Modell soll eine auch dauerhafte Überwachung verschiedener Vitalparameter bieten und auch die Aktivität feststellen.