No in-wall wiring needed, used as a wall mounted switch or handheld remote. 1 on the switch control light socket 1, 2, 3 as well, All control all light sockets, perfect for the elderly and those with limited mobility or back pain. The lamp adapter and wireless switch with strong RF signal works through walls and doors without any interference. Up to 100 ft. range in open areas, you can control garage or porch lights in a distance conveniently. Simply screw in the light base and use with the controller. E26 E27 light socket can be switched manually or controlled by wireless controller, save energy, eliminate power wasting and save your money. Color: White.