Conntek EV1430T NEMA 14-30P to NEMA 14-50R Pigtail Adapter Compatible with RV and Tesla Use Plug (Male): NEMA 14-30P (Straight Blade 30 Amp 125/250 Volt, Commonly Used for Modern Dryers) Connector (Female): NEMA 14-50R (Commonly used with Tesla, RV use) This handy adapter will allow owners of Electric Vehicles charge their cars up to 30 Amps 125/250 Volts of service Compatible with RV use as well