ParkPower 128A Generator Adapter, 30A/125V Connector and 20A 125/250V Locking 4-Prong Male Plug 20A 125/250V 4-prong locking (male plug) to 30A 125V RV use only (female side) Compact Generator Adatper Allows you to connect a standard RV cordset to different types of electrical receptacles on portable generators Weather resistant, durable construction