1 stores are selling it on Ebay with promotions. Other top attributes are OxyWatch, Pulse Oximeters and Fingertip. Also usa fda finger pulse oximeter blood is one of the top sellers in and in 2021.

USA FDA Finger Oximeter Blood O2 SpO2 Heart Rate 1.Introduction Pulse portable equipment technology, checks SpO2 and value through finger, provides advanced, non-invasive scientific means for measurement of oxygen Oxywatch applicable for plateau area, healthcare, oxygen bar, Fitness physical and medical institution, 2.Features 1) Can accurately and Pulse display,bar display Battery voltage low off automatically signal 3.Performance range: Accuracy: ±2% 0%~69%: PR ±2bpm is greater.
Resolution: 1% 1bpm Performance in Weak Condition: SpO2 rate can shown correctly pulse-filling is is ±4%, error bpm or ±2%, is greater. to light: The deviation.
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