Digital thermometer reads the temperature automatically and switches off.
It has a function to save the last measurement reading.
Press on/off button, wait for LCD display 188.8 to make sure the thermometer working well and battery stay good condition, then it will display the previous saving memory as well as activate the working figure 37.0.
If the environmental temperature is higher than 32.0 C it will directly display the figure and begin measuring the temperature.