WIRE-FREE 3-WAY DIMMING: Pairs wirelessly with Decora Smart Wi-Fi 2nd Gen D26HD Dimmer or D23LP Mini Plug-In Dimmer to provide additional On/Off and Dim/Bright control locations. (Decora Smart Wi-Fi 2nd Gen device required and sold separately) EASY TO INSTALL WITH LONG-RANGE: Mounts on the wall surface or at the wall box within a 50-foot range of the primary device. WIRE-FREE DIMMER SWITCH: Add on/off and dim/bright control where you need it such as at the base of a staircase or end of a hallway CONTROL SMART PLUGS FROM THE WALL: Add on/off and dim/bright control of connected table, floor, and hanging lamps - no wiring required LONG-LIFE BATTERIES: Includes easy to replace batteries with 5 year life