Large buttons allow the user to control the product with less fine hand coordination and/or targeting. This is a useful feature for people who have difficulty using their hands or fingers, and for people who are blind or have low vision, assuming that the key labels are correspondingly large and clear.
Having large buttons addresses:
1193.41(a) Operable without vision.
1193.41(b) Operable with low vision and limited or no hearing.
1193.41(e) Operable with limited manual dexterity.
There are no Product Types that generically include large buttons.