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Question:

“Is there a saxophone with a transpose button?”

Just like most piano are manufactured with the transposed button that would allow the player remain on a particular key while the musical composition is on a different key through the aid of the transposed button, has any sax been produced with such element/feature?
-Robinson

My response:

No, not really.

Playing the saxophone, for the most part, requires learning different keys since music is written in different keys.

There is an “electronic wind instrument” (acronym, the EWI) which can be transposed with a button.

But it’s not exactly a saxophone. It can transpose like that because it has electronics inside.

No actual saxophones with that feature.

-Neal