Please note: If using Nema 6-15 or Nema 6-20 power cords, your power supply device needs to accept various voltages (from 110 volts to 250 volts). Verify voltage matching before use, as Nema 6-15R or Nema 6-20R only accepts 15A/20A at 250 volts, with a maximum load of 20A/2500W. 4-in-1 AC Power Adapter Compatibility: This [4 in 1] AC power adapter Converter seamlessly converts NEMA 5-15P plugs (standard 15A/125V household) into 3 professional grade sockets: NEMA 5-20R (20A/125V), NEMA 6-15R (15A/250V), NEMA 6-20R (20A/250V). Resolve compatibility issues with workshop tools, commercial equipment across. Plug and play: This 4-in-1 AC power adapter is plug and play, No electrician needed, making it the perfect solution for emergencies! Immediately supply power to 20A equipment from a standard 15A outlets, without the need for expensive rewiring. The compact T-shaped blade design is suitable for small spaces and can be stored in toolkits or RV emergency kits. Premium Materials: This 4-in-1 15A 125V to 20A 250V AC power adapter uses pure copper inner conductors, which have stronger conductivity. Using high-quality metal plug connectors is more corrosion-resistant and High temperature resistant PC+ABS casing can prevent overheating, sparks, or short circuits, which is crucial for high-power equipment such as compressors and welding machines. Reliable Service: We hope this product can create a perfect experience for you and offer a one-year warranty for this [4-in-1]15 Amp to 20 Amp T Blade Adapter. If you have any questions about our products, you can contact us at any time, and our professional customer service will reply within 24 hours. [4-in-1]15 Amp Household AC Plug to 20 Amp T Blade Adapter 5Pack,Nema 5-15P to 5-15R/5-20R, 5-15P to 6-15R, 5-15P to 6-20R,4 in 1 AC Power Outlet Converter,15A 125V to 20A 250V Converter Adapter-Black