What kind of fitness tracker should I buy

I have a new laptop and now want to get a new fitness tracker. What I'm looking for is one that will track:

1) sleep,

2) heart rate,

3) time (watch),

4) steps/distance,

5 ) and will remind me to move.

I have a small wrist so it would have to be adjustable but I don't want a kids with the funny kid things on it like dinosaurs etc.

Thanks for any suggestions?

P.S. I read somewhere that I would need bluetooth. I don't know if my new laptop has one or not.