Product Features Display Mode:LED display SpO2 Measuring Range:0%~100%, (the resolution is 1%). Accuracy:70%~100%:±2% ,Below 70% unspecified. PR Measuring Range:30bpm~250bpm, (the resolution is 1bpm) Accuracy:±2bpm or ±2% (select larger) Resistance to surrounding light: The deviation between the value measured in the condition of man-made light or indoor natural light and that of darkroom is less than ±1%. Power Consumption:less than 25mA Voltage:DC 2.6V~3.6V Power Supply:1.5V (AAA size) alkaline batteries * 2 Safety Type:Interior Battery,BF Type Packing information *a hanging rope *a user manual Physical Identity Weight:About 75g Machine Dimension:58(L) * 30W) * 30(H) mm Box volume:10*9*4cm Outer box volume:47.5*37*21cm
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