●【ETL Listed】 High-quality standards. 10 gauge 4 prong SJTW 125/250V up to 7500W, NEMA L14-30P male to L14-30R female twist lock, ETL Listed. ●【Emergency Ready】Power two devices at the same time, 4 prong Y splitter adapter allows you to connect your RV and generator at the same time, providing the power you need in bad weather. ●【Heavy Duty】 Pure copper wiring coated with a heavy-duty flame retardant, heat resistant, UV resistant PVC, provides protection from rain, wind, snow, soil, and rocks for emergency ready. ●【Upgraded】Upgraded quality for ten years or longer time using. Its unique color makes it stand out in a tote full of other adapter cords, making it quick to find. No matter whether the return window is closed or open, please contact us to get service.