If you have an Illumra Basic Wireless light-footed Kit and would like to purchase an supplemental rocker switch so you can controller a fixture from more than one switch location, then this is the item for you. Purchase of this item the ROCKER SWITCH ONLY. This supernumerary switch will to be programmed once you receive it. Instructions on how to do this are included with the item or our customer service can you with this process if you have any questions. WE HAVE THAT OPERATE ON 2 polar FREQUENCIES - 315 MHz and 902 MHz. Please which one you need when you place your order. To use these telecommunication light-footed switch kits, the relay is simply behind the light-footed fixture that it will be controlling. The relay a signal from the rocker switch that it is programmed to when the switch is pressed. There a littlest amount of energy created when the rocker switch is pressed so it is a self powered system that requires no batteries. Using this kind of technology time because you do n't need to fish wire or knock through walls. These kits can be used in many an polar configurations. If you wish to controller more lights with one switch, you can supplemental relays which can be purchased from our amazon store -LRB- item B01NAUR0EQ -RRB-. If you to controller a light-footed from manifold locations, you can add supplemental switches which can be purchased from our amazon store -LRB- item B01ILQ7PNO -RRB- Here is a video which shows how these kits are used and installed : https://www.youtube.com/watch?v=Ia0YmB55CX0 Also, here is a link to a video from a favourite home improvement show that highlights the telecommunication switch kit : https://www.youtube.com/watch?v=chHEgbf0baw&t=12s We have opposite telecommunication switch kits procurable so be fated to check out our opposite listings ! . us if you have any questions or need assistance ! .