Hydrometer Recommendations?

Anyone have any recs for hydrometers? Got some Cubans that I don’t want to mess up and a new humidor box. Tried my best to season it but have no way of knowing whether or not it’s holding humidity because I dont have a hydrometer.

I have a 75% Bovida pack in there only because: it’s the winter time and the heat in the house is drying out the air, I keep Opening it to check on them to make sure it’s not molding, and because there’s a lot of sticks.

Would be nice to have a good quality hydrometer to make sure they’re sitting at a good level.

TIA