video link www.youtube.com/watch?v=2gzvVGRGgXo&t=55s This system uses ir remote to send data by infra red signals,we can control 5 relays by this device,this device is mainly made for smart cooler,you can use it for your need,it can set the temperature by ir remote from distance.you can set the room temperature to trip the fan and water pump in over and under temperature.