Keep your mind less tensed while your baby sleeps with the Snuza Hero MD Portable Baby Breathing Monitor. It's medically certified so you won't be buying something you can't rely on.Just clip the little monitor on top of your baby's nappy so it touches their belly. The alarm goes off if the Hero MD can't detect any breathing for 20 seconds. It also strikes a soft vibrating impulse if it can't feel breathing for 15 seconds to rouse the baby.There's no cables, just a replaceable battery, so your baby won't even know there's anything there.