 automatically creep across the pool to seal out access to the water. And I mean, some of these you can even walk across. Yeah, definitely. So let's talk now about the alarms that are available. There are pool alarms, door alarms, and fence alarms. And these are really a must-have for every home that has a pool. It's best to use a combination of all of them. So first of all, the door alarms. They're battery powered. They're installed on exterior doors that lead to the pool.