Wire-free solution - wirelessly add on/off and dim/bright control where you need it such as at the base of a staircase or end of a hallway. Use included adhesive or wall box screws to mount on the wall or at the electrical wall box within a 50 ft. range of the primary 2nd Gen device - D26HD Dimmer or D23LP Mini Plug-In Dimmer. (Decora Smart Wi-Fi 2nd Gen device required and sold separately). Add on/off and dim/bright control of connected table, floor and hanging lamps or wirelessly add a 3-way/multi-location - no wiring required.