If you'd like to maintain a pace of 42 strokes per minute, simply bring the Wetronome Wand near the middle of the Wetronome four times, and then twice. The Wetronome flashes a light and beeps each time the Wand passes near. The light allows programming on a noisy pool deck.

You can even program the Wetronome to a different stroke rate without removing it from your cap. This results in the minimum time to reprogram, and so the minimum time between sets.