MALE Plug 15Amp is NEMA 5-15, 125V. FEMALE Receptacle plug 50 Amp is NEMA 14-50R, Rated for 125V/250V max rate 12500 watts, 10/3 gauge STW wire. Power Converter: For use when RV is equipped with 50 AMP power inlet and needs to plug into 15 AMP power source. Designed with ergonomic grip handles to safely and easily plug and unplug connector. Passed UL certification, Copper wire with flame-resistant PVC outer sleeve, The ergonomics handle eliminates frustration by assisting users in safely and conveniently gripping. Only for RV, NOT compatible with EV charging.