Non-contact and fast measurement: Forehead thermometer can measure temperature in 1 second without physical contact. The infrared thermometer features a one-button measurement design for quick and convenient use. 2 in 1 Mode: The professional forehead thermometer includes forehead and surface modes. In addition to measuring human body temperature, it can also measure ambient temperature, water temperature, or object temperature. This multi-functional thermometer meets various needs. Audible and visual fever alert: The infrared thermometer has an audible alarm with adjustable temperature alert settings. It features a three-color backlight design. In body mode, the thermometer indicates temperature status through backlight color: Green (32.0–37.4°C), Orange (37.5–37.9°C), Red (38.0–43.0°C). Professional and accurate: The infrared thermometer uses infrared technology to deliver fast and accurate readings. Users can switch between Celsius and Fahrenheit as needed. Accuracy is ±0.2°C / ±0.3°F. Memory function and auto power off: The thermometer has a memory function that stores up to 99 temperature readings (in forehead mode) to help track results over time. It automatically powers off after 15 seconds of inactivity to conserve battery life.