Pulse Oximeter brand AFK model YK009 Oxygen meter FDA

Pulse Oximeter brand AFK model YK009 Oxygen meter FDA ???????? Blood oxygen meter

**** Products include all batteries. ****

Characteristics:
- Measures of the Oxygen in the blood Spo2
- Heart Rate Pulse
- OLED color screen is highly accurate (Spo2 accuracy 2%; PR, accuracy: +- 2 bpm)

Specifications:
Size: 57.2 x 31.5 x 32.5 m M.
SPO2 Measurement: 0% -100% (Resolution +- 1%)
Spo2 precision: 94%- 99%: 2%
PR measuring range: 50-130 BMP ( Fine 1 BPM)
PR precision: +- 2 bpm
DC voltage: 1.5V
Power supply: 2PCS AAA battery (no battery)

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????- Oxidant until the blood (Spo2): should be in between 95-100%, which is normal. Pulse Rate: Usually at 70-90 per minute, but when exercising The heart will beat more frequently 100-135 times per minute.
????- 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 specified value by the machine manufacturer. In general, if the PD> 4% is considered that the area has sufficient blood flow.