[IMPORTANT] Your power devices need to accept WIDE RANGE VOLTAGE ] (range from 110Volt to 250Volt) in case of working with Nema 6-15 or Nema 6-20 Power cord, Because Nema 6-15 or Nema 6-20 accept only 15A/20A @250 Volt, [Increase the EV. Cars Charging Speed] Nema 5-15P Household 15AMP 125VOLT Male to Nema 5-20R(20AMP 125VOLT) female AC Power Adapter. (Increase the speed of charging your EV. Car via Nema 5-20 (20AMP 125VOLT), It allows you to charge on your outside plug which is wired to handle 20 amps but has a standard wall plug. These work well, and are not even warm to the touch after 12 hours at 16 amps charging. It does make the mobile connector hang away from the wall and tilt a little, but stay plugged in. [4 in 1] AC Power adapter. Nema 5-15P 15A male 125V to Nema 5-15R/5-20R/6-15R/6-20R ac adapter, (A);Nema 5-15P 15-AMP Male(125V) to Nema 5-15R 15-AMP Male(125V) Female ac adapter, (B):Nema 5-15P 15-AMP Male(125V) to Nema 5-20R 20-AMP Male(125V) Female ac adapter; (