otherwise product is fine, but the relay used in the module is for 110 VAC which is not much useful as per domestic supply in India, i.e. 220 VAC.
And this module can be used for refrigeration or cooling as the temperature increases above a set temperature then relay (NO relay is used in this module) works.
But we can't use this for heating.
Very good quality product, and the price is less than other online sites ,value for money spend.