Keep your family, pets and valuables safe, Alarms to alert you with the sound of a beep if the set distance is breached, both units also vibrate and have indicator lights Great for keys bags and purses. Shopping or going on Holiday with Children? the units will make sure they dont go too far without you knowing. A comfortable childrens/babies wrist band alarm that will keep your child within a close distance of you and will beep and vibrate should someone other than you try to switch it off.