4 display directions, 6 display styles
Brightness can adjustable from 1 to 4
8 seconds automatic shutdown
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
Power Supply:1.5V (AAA size)
alkaline batteries * 2
Safety Type:Interior Battery,BF Type