Other durations
About a 2 hours alarm
2 hours is roughly one full sleep cycle, the length that tends to leave you feeling refreshed rather than groggy. It works well as a recovery nap after a short night.
The alarm is created as a one-time alarm at the exact clock time, so you can see it in the list above, rename it, or switch the sound. Keep this tab open with the volume up; on desktop it rings from a background tab, on a phone keep the page in the foreground and the screen stays on automatically.
Prefer a countdown?
If you want to watch the time tick down rather than set a clock time, use the 120 minute timer instead. Both ring with the same sounds.