Parkworld 691593 Power Adapter 4-Prong 20A Generator Locking L14-20P Male Plug to RV 30A TT-30R Female Receptacle, Green Generator Adapter L14-20P to Recreational Vehicle TT-30R 125V/2500W, ONLY output 125V. Generator Locking 4-prong 20A L14-20 male plug. RV 3-prong 30A 125V TT-30 female receptacle. Connect Locking 20 AMP L14-20 plug to RV with a standard 30 AMP TT-30 RV adapter, Heavy-duty round power adapter plug for generator. 1 piece AC adapter molded PVC with 100% copper conductor inside, Test by UL & cUL standard.