NO-CONTACT:  Digital LCD Infrared Forehead Thermometer. Easy to use. No need to touch the patient. 1-second rapid measurement, especially great for forehead readings. MULTI-MODE THERMOMETER: Can take temperature of Body or Surfaces. Can switch between°C and °F.  A maximum of 32 previous readings is available to help you track the changes in your body temperature. RELIABLE AND ACCURATE: Delivers temperature readings with Unfailing Accuracy and very fast. Measurement deviation ± 0.2℃/℉. Fast: Measurement time is <1 second. One-button measurement for easy operation. It is equipped with a clear LED Digital Screen and large operating buttons. AAA Batteries NOT INCLUDEDTo switch from C to F, Press Set Up for 4 seconds to access F1, then press - to change to F. Then Press Set Up to cycle to the main menu. And make sure you are in Body mode not Surface mode.