Controlled by an app, a smart plug lets you turn on and off any appliance that plugs into a standard wall socket. As part of a solution like Alarm.com, you can actively control it, or automate it so that it reacts to schedules and triggers from your security system. Simply plug it into any wall socket, then plug your chosen appliance into it. You can use it with a lamp, a TV, a cable box, a coffee machine—whatever you like.