When the device is turned on or off, it may emit a sound. This is the material
expanding and shrinking during heating and cooling down.
Set the ON/OFF switch to the ON position (Figure 1, pos. 1).
The control panel and display (Figure 1, pos. 2) will light up.
Press the Plus or Minus button to set the desired temperature, from 0 °C to
37 °C. The device starts heating when the set temperature is higher then the
ambient temperature.
The display will first show the set temperature for 3 seconds followed by the
ambient temperature.