Garmin Vivosmart 4
Garmin Vivosmart 4 was announced. It has pulse oximeter feature and it can track SPO2 value during sleeping. However it is not very clear how often it samples the SPO2 value. At this moment, I am not sure if it is useful to collect some reference data for Sleep apnea. (This device has not been certified as a medical device yet and it will be just for a reference data)
This feature was introduced in fenix 5X plus a few months ago from Garmin. But the price is very expensive and it is no way to get it just for a testing. However, this is not very expensive and I would like to get it for some testing. There are some posts for reviewing this device on the internet.
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