[ Infrared Technology = Non-Contact = Prevents Cross-infection = Stay Healthy ] Built-in infrared high technology IC, no need to contact forehead, ear, or oral to take the temperature, instead, stay far away to take, that's mean there's no way caused of cross-infection [ Clinically Tested = Accurate Readings = Prevention is Better Than Cure ] Built-in high tech intelligence IC, a very small error margin 0.1°F for body mode, and 1.0°F for ambient mode, accurate than standard thermometers. Get know the accurate temp, get early prevention, stay health [ The Higher Temperature Beep Alarm = Stay Safety ] RED=HIGH FEVER: 38℃---42.9℃=BEEP ALARM, Green=Normal: 32℃---37.5℃, Yellow=High: 37.6℃---37.9℃. This infrared thermometer gun shows different colors of the backlight