It’s just a watch (with a pretty bad led so you can maybe half-see it in the dark). Nothing life-changing
What gramps is trying to say is that if you look up the time on a simple watch you won’t get sucked into your phone. Which shouldn’t be an issue if you have a little bit of self-control.
It could be great however if your school doesn’t allow phones and doesn’t have working clocks in each classroom.
Looks like this:
You’ve probably already seen it
Water resistant in this specific case, but there are models that are waterproof