Last reading recall: the memory function helps prevents to monitor baby’s condition.Used in 3 modes: Oral / Underarm / Rectal measurement.Buzzer function to alert when measurement is complete.Battery replaceable.Water resistant. When inserting the unit (for oral and rectal use), insert it gently.Disregarding the information given in the instruction manual is considered to be abnormal use.After showering, exercising, eating or drinking, wait for 30 minutes before you intend to measure your temperature.If it displays “Err”, it means the unit does not work properly. Check whether the operation temperature is out of rangeTurn on and keep pressing the start (I/O) button for 5 seconds till the F display appears on the screen, then release the button.For each start, the LCD will show the latest swift unit.