Two and a half minutes is a common cooking and brewing length — about right for steeping a cup of green tea, a short recipe step, or a quick meditation. It is also a long, steady interval for when an effort is meant to be a grind rather than a sprint.
The repeat math is simple: four rounds of 2:30 is ten minutes. The editor takes a round count for anything you run in repeated stints.
A 2 minute 15 second timer — 2:15, for a recipe step, a steeping tea, or a focused window. Repeats as many times as you set.
A 3 minute 30 second timer — 3:30, about right for steeping black tea or the length of a song. Repeats as many times as you set.