Hello @Michaeltt12345 and welcome to the Community. The ECG and SpO2 monitoring are medically regulated features. They needed US Food and Drug Administration approval for release in the US. These features need to be approved by the equivalent regulatory board in T&T to be available there.
Laurie | Maryland
Sense 2, Luxe, Aria 2 | iOS | Mac OS
Take a look at the Fitbit help site for further assistance and information.
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