[5PCS in One Package] Your devices need to support WIDE VOLTAGE [range 110V to 220V] in case of connect to Nema 6-15P or Nema 6-20P 15A/20A 250V ac power devices. [4 in 1] AC Power adapter. Nema 5-15P 15-AMP male 125V to Nema 5-15R/5-20R/6-15R/6-20R ac adapter Compatible 1: Nema 5-15P 15-AMP Male(125V) to Nema 5-15R 15-AMP Male(125V) Female ac adapter Compatible 2: Nema 5-15P 15-AMP Male(125V) to Nema 5-20R 20-AMP Male(125V) Female ac adapter Compatible 3:Nema 5-15P 15-AMP Male(125V) to Nema 6-15R 15-AMP Male(250V) Female ac adapter Compatible 4:Nema 5-15P 15-AMP Male(125V) to Nema 6-20R 20-AMP Male(250V) Female ac adapte