Spo2 in galaxy watch 4 Clearance

Product Name: Spo2 in galaxy watch 4 Clearance
How reliable is the SPo2 readings on the Galaxy Watch 4. I'm surprised to see it this low. Can cold environments cause stuff like this? : r/ GalaxyWatch Clearance, Samsung Galaxy Watch4 Classic blood oxygen sensor - YouTube Clearance, Galaxy Watch 4/5 - How to Measure SpO2 (oxygen saturation) - YouTube Clearance, How reliable is the SPo2 readings on the Galaxy Watch 4. I'm surprised to see it this low. Can cold environments cause stuff like this? : r/ GalaxyWatch Clearance, Smartwatches Have Measured Blood Oxygen for Years. But Is This Useful? - CNET Clearance.