... 15 minutes)3. Oxygen spray:Use Mist Sprayer to spray oxygen on the face to make skins accommodate with the pure oxygen status ... pull back and down to spray mist, by press down to spray oxygen. Adjust the end knob of the sprayer to adjust the mist volume ... oxygen, how is the people going?Less oxygen at brain——Swirl, headache, tingle, nausea, nervous, lose heart, consciousness and to be death ...