How it worksThe Braun Forehead Thermometer is designed to measure the temperature of the skin surface over the temporal artery, a major artery of the head. This temporal artery is connected to the heart, offers constant blood flow, and is the only artery positioned close enough to the skin surface to provide an accurate temperature measurement.Fever GuidanceLarge color-coded screen with instant fever detection. A green screen indicates no fever is detected, yellow suggests a slightly elevated temperature, and red signals fever may be present.