Oxygen meter, 1 year warranty, Yonker YK-80B, YK-81 Pulse Oximeter, Oxygen measurement in the blood.

Oxygen gauge Fingertip Pulse Oximeter, Yonker brand YONKER model YK-81
Free delivery in Thailand ???????? 1 year insurance ????
- for high quality oxygen level measurement PLUSE RATE PLATE PLATE PLATE PLATE and Available Cardiac.
- There is a warning sound when the value is abnormal.
automatically shut down in 8 seconds. >
**** Products include all batteries. ****

Characteristics:
- Measure the saturation of the oxygen in the blood test, ihb arrhythmia test
- System screen OLED is highly accurate (SPO2, 2%incorrectness; PR, accuracy: +- 2bmp)

video link: https://bizcommon.alicdn.com/fcurwflxbqgggggggggggggggggggggggggggGvNamnuisdvgrwl%40 stand. MP4

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????- Oxidant until the blood (Spo2): should be in the range between 95-100%, that is, the normal range is less than 95%. Lower than the standard. The heart will beat frequently to 100-135 times per minute. In normal conditions, if less than 60 times/minute or more than 100 times/minute means an abnormal pulse.
????- Assessment of Perfusion Index% (PI%) on Pulse Oximeter
is Blood circulation in that area In general, this PI value may be valued from 0.02% to 20%. It may depend on the values ​​specified by the machine manufacturer. In general, if the PD> 4% is considered to have enough blood flow.

Specifications:
Size: 58 x 35 x 30 mm. : 0% -100% (1% resolution)
SPO2 precision: 70%-99%: 2%
PR measuring range: 30BMP-250BMP - 2BMP
DC voltage: 2.6V-3.6v
Power supply: 2PCS AAA battery (without batteries)