Now there is no need to disturb your baby to take her temperature or worry about having to continuously get up to check on her when she’s sick. Our Fever Monitor clips onto her diaper or pajamas and takes her temperature from the skin’s surface. The Fever Monitor beeps if her temperature spikes up one degree or if contact is lost with your baby's skin. The beeps are loud enough to be picked up by your sound monitor but also soft enough not to wake up your sleeping baby. Now both you and your baby can get a good night’s sleep! Remember, the Fever Monitor is not a substitute for a visit to your physician. If your child’s temperature goes about 100ºF, you should consult your doctor. The Fever Monitor requires one 1.5 Volt A76 alkaline battery (included).