Easy to use: last temperature recall; fast, 10 second read out*; battery/storage case included; automatic shut off; oral, underarm or rectal use; signals when complete; guaranteed to be as accurate as glass thermometer; large night light display for easy reading; can be used in either Fahrenheit or Celsius mode. Added safety: no glass to break; mercury free. *10 seconds time based on average of times for rectal use in clinical testing. Soft flexible tip for added comfort.