This AC WORKS brand super durable EVSE charging adapter is compatible with both Gen1 and Gen2 Mobile Connectors. It is a NEMA 10-30P to NEMA 14-50R. The NEMA 10-30P is a 30 Amp, 250 Volt, 3-prong dryer plug. The NEMA 14-50R is a 50 Amp, 125/250 Volt, 4-prong straight-blade female connector. The adapter is 1.5FT in length with an STW heavy-duty 10/3, 600 Volt jacket with 30 Amp wire.