Heating/Cooling Mode: This LED digital temperature control module has 2 working modes, heating mode (the start temperature is lower than the stop temperature) and the cooling mode (the temperature start temperature is higher than the stop temperature). DURABLE MATERIAL: This digital thermostat switch is made of ABS. The flame retardant ABS shell is non-toxic and environmentally friendly. High security, aging resistance, sturdy and durable. Stable and reliable: LED indicators can display the current output status. The digital display tube can display the measured temperature, and the control precision is high. Wide temperature control range of -50C. at 110C. Temperature control accuracy is 0.1 higher. Waterproof probe: Our temperature control module is equipped with a 1 meter NTC10K stainless steel probe, which is waterproof and not easy to rust, easy to operate and has a long service life. Wide range of applications: Temperature control modules can be widely used in air conditioning systems, incubators, equipment enclosures, temperature control protection, cabinet cooling systems and other domains.