 Now, when purchasing a pool alarm, you always want to buy the type that includes a remote receiver so that you can monitor the pool from inside the home, even with the door closed, the air conditioning on. You know, this way you really can hear what's happening. Now, keep in mind that while pool alarms can provide emergency notification if a child falls in, they are definitely not a substitute for fences, covers, or any of the other protective measures possible. So you definitely need every one of those three layers to make sure you and your children are totally covered.