Child Distance Monitor Early warning alarm system detects when child strays too far from adult supervision. Ideal for mall, busy urban areas, beaches, theme parks, airports, etc. The Angel Alert is activated when pulled apart into two small leightweight, easy to wear units; one each for adult and child. Child wears transmitter & adult wears receiver; an alarm sounds on adult's receiver when child strays (approx 30') from supervising adult. Child's transmitters includes a panic button. This device can also be used to protect laptops, briefcases, purses and other valuables. Includes: 2 neck cords (adult & child's safety break-away version), 2 large and 2 small clips to easily attach to belt loops, etc., 2 replaceable, long life lithium cell batteries.