A pee alarm is a device that emits sound or vibration when moisture is detected. It is used to immediately notice the first moment of wetting.
Example: a child wears a discreet alarm in their underwear during the day. At the first drops, a signal sounds and a short toilet moment follows.
This is how it helps: the first signal makes it easier to feel the difference between staying dry and getting wet. That helps the body signal faster recognition.