The Poolguard door pool alarms are top-rated and proven to be louder and more effective than any other pool alarm on the market today. Studies have shown that the majority of child drowning accidents occur when the child walks out the back door. This is a scary fact for parents with pools, but luckily there are ways to prevent this from happening—first and foremost, outfitting your door with a proper door pool alarm. The Poolguard door alarm has been tested and proven to perform.Once an unsupervised child goes through the backdoor, Poolguard will sound within 7 seconds. The alarm will continue to sound until an adult shuts it off and resets it. These advanced alarms are also equipped with a feature that allows adults to pass through without sounding the alarm. Poolguard alarms use a 9-volt battery that can last up to one year, and it has a low battery indicator to let you know when it’s time to be replaced. The Poolguard DAPT-2 has been tested and proven as the loudest door alarm in the industry, for an effective safety feature.