Easy to use. Last temperature recall. Fast, 10 second read out.* Battery and storage case included. Automatic shut off. Oral, underarm or rectal use. Signals when complete. Clinically proven to match glass thermometer accuracy. Large night light display for easy reading. Can be used in either Fahrenheit or Celsius mode. Soft flexible tip for added comfort. Added safety: no glass to break, mercury free. *10 seconds time based on average of times for rectal use in clinical testing.