using a Childs o2 oximeter?

I find the adult wellvue o2 ring to not be snug and it's giving me strange readings when I wear it during the day to largely not trust it at night - spo2 wildly fluctuating.

Does anyone have any input on whether I can wear the Childs versions - it will be smaller and likely fit better - any other issues im not thinking of here?

https://www.amazon.com/Wearpulse-Childr ... B0BZY7M2LQ

thanks in advance!

The technology (emitted wavelength of the blood) should be the same in either ring. However purchase from Wellue gives you the opportunity to return if your dissatisfied. Otherwise contact Wellue customer support