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Buy Fitbit Inspire 2 Fitness Tracker (40.9mm) (24/7 Heart Rate, FB418BKBK, Black, Silicone Band) Online - Croma
![What's the two red squares on the top and bottom on the back of the Fitbit Inspire 2? I know the middle green one is the heart rate sensor. Are all three What's the two red squares on the top and bottom on the back of the Fitbit Inspire 2? I know the middle green one is the heart rate sensor. Are all three](https://i.redd.it/crzb1h4rt4r81.jpg)
What's the two red squares on the top and bottom on the back of the Fitbit Inspire 2? I know the middle green one is the heart rate sensor. Are all three
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