Eh, not sure what you are asking. But it certainly functions as a "button" and it has haptic feedback. Meaning one crown press brings up apps, I think two crown presses bring up last-used app, press and hold = Siri, etc. So I think that qualifies as a "button." And haptic feedback as well, for example when scrolling through apps, it "clicks" with haptic feedback. Has worked flawlessly for me thus far.