KIUZOU Pulse Oximeter | Digital OLED Blood Oxygen (SpO2) & Heart Rate Monitor

If the value is below 94%, Insufficient oxygen. 133R(oled):SPO2,PR,PI,RR. Display Screen: Blue and Yellow two-color OLED screen. SpO2 PR PI RR. OLED screen,good display effect. Respiratory pulse ratio is 1:4, each one breath, four pulse beats.

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