https://apps.garmin.com/en-US/apps/5fc2b92c-fbf5-42c2-9f6c-597a6520e896

Could you please elaborate on that? What do you mean with sealed product?
Is the sunrise/sunset feature supported on the fr235? It doesn't appear on mine. Thanks
Yes, it should be :) Do you have an sunrise icon with "--:--" above the battery icon or you don't see sunrise at all? If you don't see it at all, do you have the latest version of Superb, or do you have it enabled in the configuration?