Other durations
About a 1 hour 10 minutes alarm
1 hour 10 minutes is long enough to drop into deep sleep but not long enough to complete a full 90-minute cycle, which is why naps of this length often feel worse than a 20-minute one. If you can, choose 20 minutes or 90 minutes instead.
If you fall asleep in the usual 14 minutes, 1 hour 10 minutes gives about 56 minutes of sleep, roughly 0.6 sleep cycles of 90 minutes. Waking at the end of a cycle feels better than waking in the middle of one: the closest cycle-friendly alarms are 1 hour 45 minutes and 3 hours 15 minutes from now (each allows about 15 minutes to drift off).
1 hour 10 minutes is 70 minutes, or 4,200 seconds. In hours and minutes that is 1 h 10 min. The alarm time updates live above, so the number you see is the actual clock time it will ring if you press the button now.
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 timer instead. Both ring with the same sounds.