Blood oxygen is probably the crucial indicators of human overall health. The intelligent ring COLMI R02 can report your blood oxygen facts.??ng ký nh?n b?n tin Nh?p e-mail ?? ??ng ký nh?n b?n tin m?i nh?t t? WikiBacsi.Chrome steel shell: The COLMI R02 clever ring shell is crafted from stainless steel, which is very corrosion-resistant, wonderful