4 in 1 nema 5-20 Extension CableNema 5-15P 15-AMP male plug 125V to Nema 5-15R/5-20R/6-15R/6-20R AC. WIDELY COMPATIBLECompatible 1: Nema 5-15P 15-AMP Male(125V) to 5-15R 15-AMP/5-20R 20-AMP Male(125V) Female AC adapter; Compatible 2:Nema 5-15P 15-AMP Male(125V) to 6-15R 15-AMP /6-20R 20-AMP Male(250V) Female AC adapter. SAFE and STABLE Transmission Current PVC rubber protection + SJTW 12AWG pure copper conductor, low heat generation, will not crash, insufficient power supply, and provide a safe and reliable connection. SMALL and CONVENIENT1ft/35cm power extension cord, very convenient to carry at any time, plug and play, fast to use. NOTEIf you connect to a Nema 6-15P or Nema 6-20P 15A/20A 250V AC power supply device, your device needs to support voltage: 110V to 220V.