I could not find a nylon strap specifically for the Amazfit Balance. However, we do offer nylon straps that have a bridge width of 20 mm like the Amazfit Balance: Articles: 37182869 and 11600361.

The watch face of the Amazfit Balance is variably adjustable. It offers different wristwatch faces that can be customised via the associated app.

Yes, start and end are both the entries you can change if you need.