The Nighthawk Bedwetting Alarm is a safe, discrete and effective treatment solution for bedwetting. It is suitable for all ages and works by conditioning the user to waking up at the feeling of the slightest bit of moisture or a full bladder. The Nighthawk is one of the most effective and successful bedwetting alarms available. Developed over 25 years, the Nighthawk has helped thousands of families overcome bedwetting and enuresis and continues to impress. The Nighthawk Bedwetting Alarm comes with batteries & instructions included and will arrive ready to use.