Taking your temperature has never been simpler, you just put the Digital Thermometer tip under the tongue and keep your mouth closed during reading. After a standard time, the beep sound shows. It is the signal to inform you that the measurement is finished. Specially, this thermometer has a function of memorizing the last temperature. The reading is only over-written in the case that new temperature value is listed. LCD display, green backlight display (for 60 seconds after measurement), easy to read results;