The beurer ft90 contact free infrared thermometer measures the body temperature entirely without skin contact and even works while people are asleep. you simply hold the device several centimeters in front of the forehead and within two seconds you will receive the exact result. it has an integrated a fever alarm that rings when a measurement is equal to or greater than 100.4 degrees and has an easy interpretation using smiley face or sad face icons the versatile thermometer can measure the temperature of an object i.e. a baby's milk bottle. the ft90 can even measure the temperature of a room ensuring maximum comfort