The ADT Pulse Smart Outlet can be used to control lighting as well as small appliances that are plugged into the bottom outlet. (The top outlet is a normal one.) This outlet is similar to adding an
ADT Pulse Lamp Module with the difference needing to swap out the electrical outlet vs just plugging the Lamp Module in. But it's nice to not have the module there when you can fit it inside the outlet.
Since the ADT Pulse Smart Outlet is a powered ADT Pulse device, it also functions as a zwave repeater for the mesh network.