The alarm consists of two parts: one of them is attached to the child's clothes: laces, button, zipper, the other has a parent. Use the dial to set the distance we agree to so that the child moves away (for example, 10 meters).
When the toddler goes further than we have determined, the device will signal it to us audibly.
Do you think a good patent?
P.S. Not accidental name: the device can also be used ... for animals, so as not to lose your favorite pet.