Three Backlight Colours Green: Normal 32.0 - 37.4 C Yellow: Slight Fever 37.5 - 38.6 C Red: High Fever: 38.6 - 42.9 C Celsius or Fahrenheit display Measures Body or Ambient Temperature 1 Second Beep Signal Memorizes 32 temperature sets 20 Second Auto Shut Down “Non-medical, not recommended for institutional or healthcare use.”