The PLV-1/2 plug-in style adapter is used to convert any of the 120 (or 240v) outlets used on the Croptiva products, to provide a low-voltage 24vac output. The PLV-1/2 can power irrigation solenoids or any other device that requires 24vac up to 25Va. Simply plug in the PLV-1/2 to the powered outlet you want to use, then hardwire your device to the terminals on the side of the PLV-1/2 adapter.