Replace the old switch with the WiFi switch.This switch can be used to turn the heater or boiler on and off manually or from your mobile phone, via WiFi and with timer and scheduling functions for hours and days and through notification scenes on your phone. It is not used for temperature regulation.Advantages:WiFi direct connectionRemote control via 3G/4G/WiFi on mobileCrystal tempered glass panel with manual touch button.LED light indicator at nightTimer/scheduling controls are available