The HTD8813C Contactless Temperature reader can easily switch from Celsius to Fahrenheit. Great for traveling or if needed for different applications. Also contains a high temperature detector that will trigger an alarm if the reading is over the healthy limit so you can react quickly. Use your temperature reading without having to touch the other person. Simply hold the reader 2-5 centimeters away from the forehead for a super accurate reading. No need to wipe or sanitize the thermometer after each reading!