What a 2 minutes timer is for
Two minutes is how long dentists recommend brushing, and the classic "two-minute rule" for small tasks. The page loads with the countdown already set, so the whole interaction is one click.
The timer runs on the browser clock, not a server, so it works offline once the page is open and it keeps counting in a background tab. At zero it plays a short chime; keep the tab unmuted if you plan to walk away.