Angel Care baby monitors for sale. The sensor pad goes in the bottom of the crib and can sense your baby's breathing and movements. The alarm will go off if no breathing is detected. Also alarms you if baby is all crammed up in the head/foot of the crib. The monitors are also used as regular monitors with a parent unit that can be placed anywhere inside or outside your home. It runs on both electricity or battery power. Used for one child and comes from a smoke free home.