How to Properly Measure Your Heart Rate and Blood Oxygen Level On the Letsfit IW1 Smartwatch

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The Letsfit IW1 Smartwatch allows you to quickly and accurately measure your heart rate as well as your blood oxygen level. Your heart rate data can be tracked throughout the day, allowing you to see a more complete picture of your heart's activity.

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Sir, Why is heart rate not giving any figure ?

obejewhoonome