Fingertip Pulse Oximeter Blood Oxygen Saturation SPO2 Meter

Specifications sleep monitoring time: 8 hours display direction: oled blue and yellow two-colour display, 6 display modes, 4 display directions display type:oled display spo2 measurement range:70%~99% accuracy: ±2% on the stage of 80%~100%; ±3% on the stage of 70%~80%; below 70% no requirement resolution: ±1% pr:measurement range: 25bpm~250bpm accuracy: ±1bpm or ±1%(the larger one) power: 2x aaa 1.5a alkaline batteries (not included) power consumption: below 30ma automatic power-off:the product shuts off by itself when no finger is in the product >=8 seconds operation environment:operation temperature: 5c~40c storage temperature: -20c~55c ambient humidity: 15%~85% non-condensing