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Amazon.com: Fitbit Sense 2 Advanced Health and Fitness Smartwatch with Tools to Manage Stress and Sleep, ECG App, SpO2, 24/7 Heart Rate and GPS, Blue Mist/Pale Gold, One Size (S & L
Fitbit Charge 5 tracks heart rate, sleep, SpO2, and ECG for less at $107 (Reg. $150)