Contec Pulse oximeter digital CMS50D2 supplied without battery

Reliable and instantaneous oxygen and pulse measurement in only two steps.
Insert your finger into the device.
Press the single button and your oxygen saturation is displayed.
No more complicated electronic oximeters to worry about!
And how does it work to measure oxygen levels in the blood?
Despite its simplified ergonomics and apparent simplicity, this pulse oximeter hides state-of-the-art electronics that are very close to the best devices on the market. It uses in particular the infrared measurement which combined with the Beer Lambert method allows to obtain a great precision of measurement of the oxygen in the blood.
Clarity and adjustable brightness of the data display:
This pulse oximeter has a quality display with an adjustable intensity. Moreover, the information is displayed in color, which greatly facilitates the readability of the screen. For a greater comfort of reading, the orientation of the data is also modifiable, one can thus be put in normal mode (horizontal display) or vertical.
Contents of the box :
1 x Contec pulse oximeter
1 X Wrist strap
1 X User's manual in French
Delivered WITHOUT the two 1.5V AAA batteries
Specifications :
Information
Display mode
Blood oxygen saturation (SpO2)
2-digit digital OLED display
Pulse rate (PR)
3-digit digital OLED display
Pulse intensity (bar-graph)
OLED bar graph display
SpO2 parameter specifications
Measurement range
0%~100%, (resolution is 1%).
Accuracy
70%~100%: ±2%, below 70% not specified.
Pulse parameter specifications
Measurement range
30bpm~250bpm, (resolution is 1bpm)
Accuracy
±2 bpm or ±2% (select the greater)
Safety type
Internal battery, type BF
Pulse intensity
range
Bar graph display, the higher the bar display, the stronger the pulse.
Battery type
2 x AAA 1.5V batteries or 2x AAA rechargeable batteries
Battery life
Can operate continuously for 20 hours with 2 x AAA 1.5V,600mAh batteries
Dimensions and weight
Dimensions
60(L) × 30.5(W) × 32.5(H) mm
Weight
Approximately 50g (with batteries).