Missing children is increasing based National Center for Missing and Exploited Children, nearly 800,000 children in a year, or approximately over 2,000 children being reported missing each day. To reduce this crime, SmartTarget has developed an alarm system to help parents locate their children and keep them around; they called it the Kiddo KidKeeper System.
This alarm consists of a transmitter (attached to the child) and a receiver (carried by the adult) which connect them together. If the child move outside the maximum distance set in the alarm, a warning sound will warn the adult and the transmitter will show a visual signal to allow the adult find the child quickly.
From : SmartTarget