The UT305R non-contact infrared thermometer is ideal for quickly detecting elevated body temperature. Temperature range: 32°C ~ 42.9°C Accuracy: ±0.3°C Optimal measuring distance: 5cm ~ 10cm Response time: 250 ms Repeatability: 0.3°C Audible alarm when measuring above 37.2°C Red LED indication when measuring above 37.2°C / green LED indication below or equal to 37.2°C Additional functions such as: Data Hold, automatic switch-off, backlight, °C/°F selection, tripod connection This thermometer is intended for checking a person for possible elevated temperatures (via the forehead). It is not a substitute for a clinical thermometer. Always use a clinical thermometer when very accurate body temperature measurements are required.