Centralite 4-Series Smart Outlet review: This add-on outlet is a tiny...

Centralite’s latest Smart Outlet—the fourth version of its simple plug-in smart power outlet (also listed as the Smart Outlet Mini in some stores)—couldn’t be simpler. It’s a single-outlet plug, compact enough to allow for two units to be stacked one on top of another in a two-receptacle wall jack, and has no app of its own to contend with. Instead, you’ll need a ZigBee hub (such as SmartThings or an Echo Plus), through which you configure the outlet and operate its smart features.