2 Main Components Sensor Detect passage of urine Noise Maker Wakes Child. Very good, economical, mobile. Excellent, Robust, more costly. Vibratory unit for hearing impaired. Vibratory unit for hearing impaired.
Children learn to associate the sensation of a full bladder with the sound of the alarm.
Initially They will tighten the muscles of the pelvic floor to hold onto the urine with the sound of the alarm. Eventually they will hold on until morning, or wake and go to the toilet without the alarm going off.