Features:1. Display parameters:(PR) BPM- Measurement range: 30 bpm-250 bpm.PI-measurement range: 0.2% -30%, PI stands for perfusion index, which means blood perfusion ability.8 hours and store it in memory so that users can investigate the data themselves. The data can be provided to a professional doctor for effective sleep disorder treatment.2. Display: OLED screen in blue and yellow colors.3. Display direction: four directions, six display modesnote:1. Please check the orientation of the battery carefully. The orientation of the two batteries is different, please adjust +/- correctly. (For transportation reasons, batteries are not included.)2. Fingers should be inserted deep enough, otherwise no action can be taken3. During the measurement, please do not shake your fingers or move your body, otherwise the data may be unstable.Package Contents:1 x oximeter1 x line1 x beautiful box1 x English menu
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