While taking in-ear temperatures can be a little more accurate, contactless readings taken on the forehead are a great way of taking your child?s temperature without disturbing or distressing them, built-in artery scan function uses infrared technology to ensure the most accurate contactless reading possible (when used in accordance with the below user instructions) While forehead readings are a great way of taking initial temperatures without disturbing or distressing your child, taking temperature readings in the ear can more accurately reflect the core body temperature (the temperature of vital organs in the body), as the ear drum shares tri-colour fever alert system the 4 in 1 contactless thermometer has a tri-colour fever alert system, helping you to better understand what your child?s temperature means. once the temperature has been taken, the screen will display the reading and will either turn green, amber or red. New-born babies are not able to regulate their own body temperature, it?s therefore very important that the temperature of their surroundings are monitored to make sure that they are not too cold or too hot. You can then adapt their bedding, change their clothing or alter the temperature of their room accordingly. Features: Everything you need to care for your little one?s wellbeing, all combined in one clever thermometer Forehead mode is the discreet and easy way to take temperature readings without touching baby, perfect for wriggly toddlers or not disturbing a sleeping baby Ear mode features a tiny and precise ear tip, suitable for all ages from new-born to adult Room mode takes accurate temperature readings of any room in your home Liquid mode will take all the guesswork out of your baby?s milk or bath water temperature