Not sure if I could trust this thermometer . I had a cold and fever so I used it for the first time to test it. With old high value thermometer it was showing 38.2 and 38.3 in my ears. With this thermometer I had a reading of 37.5 and 38.1 in my ears at the same time. It just looks a big gap between readings and too far from high value one I own. Not sure if it's faulty or what but I don't think I would trust it.