Jawbone bracelet device. Where to read?

Question

Electronics

Tell me where you can read how the jawbone and fitbit bracelet works. From a technical point of view. It is also possible in English. Thank you.

Answer 1

If from the point of view of electronics, then here are a few analyzes.
https://blog.adafruit.com/2014/01/08/shine-activit...
https://blog.adafruit.com/2013/12/11/fitbit-force-.. FitBit
https://www.ifixit.com/Teardown/Fitbit+Flex+Teardo...
www.techinsights.com/uploadedFiles/Public_Website/...
Actually, you can just google the device name + teardown
=)