Read your oxygen saturation and pulse rate results with a very clear LED screen. Light weight and easy to carry. The screen automatically turns off after 5 seconds of inactivity. Power consumption: less than 30mA Blood oxygen saturation: Measuring range: 70%~99% Measurement accuracy: ±2% in the range of 80% to 99%                   ±3% within 70%~79%                   70% or less is not required Resolution: blood oxygen saturation ± 1% Pulse rate: measuring range: 30BPM~240BPM Measurement accuracy: ±1BPM or ±1% of the measured value (larger value) Battery model: 2 AAA1.5V alkaline batteries
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