 It is the Stemma Mini Relay Breakout Board. So I have a cutie pie here so I can plug in my power ground and signal and then I've got a standard sort of 110 light socket here. For my connection over to the Stemma QT Relay Board I have a lamp plug that's plugged in to my AC power and then I'm using one of these nice Wego connector nuts to connect one line and the other is going into common and then my lamp wire is going into the side of this and I'm initially setting it to false which means it's not going to trip the relay. If I just simply change this to true and hit save, bam we have our our light bulb going off so you can see I'm sort of terrifyingly underlit now. It is the Stemma non-latching Mini Relay Breakout Board.