It’s setting 4 per baby brezza website https://babybrezza.com/pages/formula-pro-global-settings-finder

Hi Nichole! We’ve been doing tests to try and find the best baby brezza setting, but at this time, we do recommend following the preparation instructions on the can, as we find that ByHeart is made best this way :) (AKA, dissolves easily and mixes smoothly!). Here's how to mix: https://byheart.com/products/whole-nutrition-formula