HIGH QUALITY- Since 1979, Wet-Stop3 is the highest quality, lowest cost bedwetting solution in the world. Alarm comes with "The Complete Bedwetting Book" on CD or download, reward chart, sticker reward system and instructions in 6 languages. SOUNDING AND VIBRATING ALARM- Several Variable Alarms so your child doesn't get used to a particular alarm sound. Strong Vibrating Alarm can be used with or without audible alarms. The alarm wakens and motivates your child to go to the bathroom to finish urinating. WEARABLE SENSOR- Wearable unit is small and easy-to-use. Alarm is attached to pajama top while the small sensor is clipped to underwear. Clip to OUTSIDE of underwear, not touching skin. (Sensor may detect sweat if against skin.)