When my significant other brought this home instead of new batteries for our old thermometer, I wasn't sure what he was thinking. Turns out this is the coolest thermometer ever! I can aim it at my children's heads while they are asleep and boom! I can see if they are running a fever. It even turns color to let me know if I should be worried. Green means no temperature, yellow means it's higher than it should be, but not quite a fever and red means go get the medicine now! It's absolutely the best thermometer I've ever had. It can change between Celsius and Fahrenheit, and you can check the room temperature and surface temperature of an item. It's pretty nifty. It's so easy to use. You just click a button to turn it on, click on the mode button to choose room/surface/body and then hit the scan button. There are only four buttons so there is no way to get confused. I love it, and so do my children. Sometimes I'll even find them playing with it and their dolls! Cute! Definitely consider getting this thermometer. You won't regret this decision.