Huawei D2 Watch BP much lower than actual?

I bought this watch last year. Last year is ok, quite accurate compare to my Omron cuff.

But recently, like this few months, the reading is a lot lower than my Omron cuff. Why?

Like 128/80 cuff but Huawei only shows 95/64. It is huge difference. This watch is certified by MMA, couldnt be like that. I try eveything also similar reading, always much lower.


Anyone encounter the same issue?

BP cuff cannot do 24/7 and not convenient. This is just a smart watch, can measure BP too. Anytime, anywhere.

Only Huawei smart watch can do BP and certified by MMA. Even Apple or Samsung watch cant do that.

No, it was very accurate last year. Almost identical with my Omron cuff.

Lately I think might be due to the way I wear it or some other issues, the accuracy drops a lot.

Thanks to myself, I solved the problem. I wear the watch too far away from wrist. I has to be 2.5 to 3 cm only. Now very accurate.