Is the Xiaomi watchs2 accurate for blood oxygen measurement

Quasi. The screen cover of the Xiaomi Watch S2 is made of two materials, the standard version uses a glass cover, and the leather version is equipped with a sapphire glass cover, which is scratch-resistant and abrasion-resistant for daily use and provides better protection. The accuracy of blood oxygen measurement can reach more than 90% compared with medical equipment. The oxygen sensor chip used is reflective, with two light-emitting diodes in the chip.