How Do I Know If I Have A Fitbit Charge 3 Or 4?

Both the Fitbit Charge 3 and the Charge 4, which will be introduced in the years 2019 and 2020 respectively, have very similar designs. The most notable distinction is that the Charge 4 is equipped with its own GPS, allowing users to monitor and record outdoor activities like as walks, runs, and bike rides without the need of also carrying a mobile device.