Use the digital flexible tip thermometer rectally for a more accurate reading. Oral (mouth) or axial (armpit) can be used but won't be as accurate. It would be beneficial for the thermometer to be at room temperature before use and to be inserted before being switched on to take a reading, which will take 10 seconds. If the “Lo” or “Hi” displays, the reading is outside the temperature range. The thermometer should be switched off, repositioned and then turned on again to take a reading. Please note: the user manual leaflet should be consulted for further advice.