Instead of a nasal cannula (tubes in your nose), it uses a wrist-worn device , a finger probe , and a small chest sensor .
It has an 89-90% correlation with in-lab polysomnography (the professional standard). It tracks 7 different data points, including heart rate and blood oxygen. buy watch pat
Doesn't measure brain waves (EEG), so it can't track "arousals" as well as a lab test. No "Tubes": Much easier to fall asleep. Mild Apnea: May occasionally miss very mild cases. Where to Buy & Cost Instead of a nasal cannula (tubes in your