Firstly, by using the Smart Wall Switch H1 EU with the Wireless Remote Switch, dual-/multi-control functions can be used very easily. The Wireless Remote Switch can be put in most places in your home to control the Smart Wall Switch via smart automation; secondly, if the original switches in your home are dual-controllers and you only replace one of the switches with the Smart Wall Switch H1 EU, please keep the other ordinary switch short-circuited and replace it with a wireless switch, otherwise, the Zigbee communication module of Smart Wall Switch can not be powered when the other switch is powered off and the switch cannot be controlled intelligently.