The thermowatch is easy to program (I use only the thermal and not the timer for a small heated greenhouse) and has since the first use of absolutely reliable service. The temperature was adjusted to 24 ° C. As soon as the actual temperature drops below 23.5, the thermowatch electricity for greenhouse switches. If more than 24.5 ° C, the current supply is interrupted again. Highly accurate and reliable. Absolute buy recommendation!