You are looking at a FPNW Fitbit Versa 2 Smart Watch and Activity Tracker.
The screen works as intended (though it will need to be charged first); the only issue detected during testing is that the heart rate monitor is not working. If you can find a way to replace the sensor or assembly (like take one from a unit with a broken screen and transplant that to this watch and redoing the watertight adhesive), then this will a worthwhile buy for you.
I used it for a time, if only to use it as a straight-up step counter, but I have since switched to another model with a working heart rate monitor.