Angel Alert child distance monitor warns you when a child strays too far. Ideal for shopping areas, theme parks, airports, anywhere you might lose track of an active child. Angel Alert is activated when pulled apart into two small, lightweight easy to wear units; one each for adult and child. Child wears transmitter and adult wears receiver; an alarm sounds on the adult’s receiver when the child strays too far. Child’s transmitter includes a panic button. Includes two neck cords (adjustable adult’s and child’s safety breakaway version), two large and 2 small metal clips and 2 replaceable long-life lithium cell batteries.