Simple to install, safe et convenient, just take a remote controller and you can turn on your light, fans, cameras, door,etc, and without worrying about them, they can turn off automatically after the delay time(0 seconds ~ 99 hours), this RF wireless remote control switch system should be a good choice for you to control your all kinds of DC 0-28V or AC110 ~ 240V electrical appliances at home！ br br Time delay remote controller (S2DA-AC220+C-4) br This is video aims to show how to remote control ac motor with time delay function. br More details, visit , you willl get what you want.