Sonoff Africa has certified this product locally with NRCS so as our customer, you have no home insurance issues. Please note should the product not be supplied by Qisystems or Sonoff Africa, ensure that the supplier you are purchasing from has that product certified. SONOFF 4CHPROR3 is a 4-gang Wi-Fi Smart Switches designed to give you the ability to integrate smart control into your existing home to enable a smart home. The smart switch has 4 gangs that can be used to control lights and other home appliances at the same time in four areas of your home. The 4CHPROR3 is designed with an RF function for RF control. The function is purposely adopted to make you turn on/off the device connected with 4CHPROR3 via the RM433 remote controller. The SONOFF 4CHPROR3 has 3 working modes self-locking, interlock and inching mode. You can set these 3 working modes on eWeLink APP itself easy to operate. So you can enable self-locking mode to turn on/off 4 connected devices separately, interlock mode to turn on 1 connected device every time and turn off the rest of devices simultaneously and inching mode to turn on 1 connected device and then make it turn off automatically after a given time (0.5 - 3600s). For the device away from the switch, you can create a moveable space in virtue of a DIN rail to make them be connected. Simply activate devices through your voice when the switch works with Alexa and Google Home smart assistant.