Save Install Costs and Time Just wire receiver between power supply and lamp, no wires, no hassle. Install the light switch without pulling wires or tearing walls, save large labor and material costs comparing with traditional switch. Can be added to the existing lighting system freely and won't affect the existing system. 1 switch can pair with multiple receivers to accomplish a switch simultaneously turn on or turn off a group of lights. 1receiver can respond to up to 8 switches. 1 receiver can connect with multiple lamps in a same circuit if the total load of the lamps is less 1000W.