Fitbit - Charge 5 has a sensor that's powerful enough to measure your body's response to stress—and the tools to help you reduce it. Omm-azing. | Facebook
Fitbit's Charge 5 packs an ECG and stress response sensor | Engadget
Advanced fitness + health tracker | Shop Fitbit Charge 5
Relax and Weather app coming to charge 5? : r/fitbit