Yellow Contec Cms50dl Fingertip Pulse Oximeter

Contec CMS50DL Fingertip Pulse Oximeter, Blood Oxygen Saturation Monitor (SpO2) with Pulse Rate Measurements and Bar Graph, Digital LED Display, Blue
Features:
Accurately measure the pulse oxygen saturation and pulse rate through finger
Simple bar graph that displays your SpO2, Pulse Rate, and Pulse Strength results.
Small in volume, light in weight and portable to carry with you
For sports or aviation use (can be used before or after sports, but not recommended to use during sports)
Simple Operation and low power consumption
Specification:
Display Mode: LED display.
SpO2 Measuring Range: 0%~100%(the resolution is 1%).
Accuracy: 70%~100%: A 2% ,Below 70% unspecified.
PR Measuring Range: 30bpm~250bpm(the resolution is 1bpm).
Accuracy: A 2bpm or A 2% (select larger).
Measurement Performance in Weak Filling Condition: SpO2 and pulse rate can be shown correctly when the pulse-filling ratio is 0.4%. SpO2 error is A 4%, pulse rate error is A 2 bpm or A 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 the darkroom is less than A 1%.
Power Consumption: less than 25mA.
Voltage: DC 2.6V~3.6V.
Power Supply: 1.5V (AAA size) alkaline batteries A 2.
Battery Working Hour: The minimum continually work time is 24 hours, the theoretical number is 56 hours.
Safety Type: Interior Battery, BF Type.