Easy to use OLED display mini portable clip spo2 sensor monitor 4 directions handheld fingertip/finger pulse oximeter

Easy to use OLED display mini portable clip spo2 sensor monitor 4 directions handheld fingertip/finger pulse oximeter   Ⅰ,Features: 1,Display Mode:Red LED display;   2,Easy operation, low power consumption;   3,Display details: SpO2 value, Pulse rate value, bar graph, battery voltage display;   4,Voltage indication: voltage indicator always appears;   5,Auto power off: without finger detected in 8 seconds   Ⅱ,Performance Parameter: 1,SpO2 Measuring Range:0%~100%, (the resolution is 1%). Accuracy:70%~100%:±2%, below 70% unspecified.   2, PR Measuring Range:30bpm~250bpm, (the resolution is 1bpm) Accuracy:±2bpm or ±2% (select larger)   3, Measurement Performance in Weak Filling Condition: SpO2 and pulse rate can be  shown correctly when pulse-filling ratio is 0.4%. SpO2 error is ±3%, pulse rate error is ±2 bpm or ±2% (select larger).   4, 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%.   5, Power Consumption:Less than 25mA
Voltage: DC 2.6V~3.6V
Power Supply: 1.5V (AAA size) alkaline batteries × 2
Battery working hour: The minimum continually work time is 24 hours, theoretical number is 30 hours.   6, Safety Type: Interior Battery,BF Type   Ⅲ,Physical Identity
Dimension: 62(L) × 35(W) × 31(H) mm
Weight:   About 50g (with the batteries)