Almost done with interpreting instructions? (timer?)

Hi all,
I am almost done with my Pomodoro. It’s a trickier project than I first thought.
I am reading over the User Stories, and questioning this one:

User Story: I can start a 25 minute pomodoro, and the timer will go off once 25 minutes has elapsed.

My “Work Session” ends after the specified time and the break starts. Is this enough to fulfill the user story?

I looked at the sample project and I didn’t hear a sound go off at the end of the work session, although searching the forum it seems like some people added a sound to theirs.

Thanks for the input in advance!