I don't even know what it's called but;
I've heard about a device that a parent would wear a thing on wrist and have it's other half on the child and if they got more than 15 feet or so apart from each other the thing on the parent's wrist would sound an alarm or some kind of alert.
To help not lose track of your child in a public place I guess.
Anyone know what this is?
Can you post a link to it?