A wristwatch alarm is simply a safety device that your child or anyone else that might be in danger around your pool can wear. It’s one of many other precautionary measures you can take to warn you when something dangerous might be happening in or near your pool.
 
The wristwatch alarm is generally linked to a centrally located “base,” probably somewhere in your house where you can easily hear it. You will be alerted with an alarm when it comes into contact with water – i.e., when your child falls in and is in distress. The device is no bigger than a wristwatch and is a great preventative measure to keep your children safe around the pool. It’s not a replacement for a good eye as you should always watch your kids while they’re in the pool.