Trasformatore Amplificatore di Potenza 65W Tipo R 0-115V-230V Audio Filo Rame R Core Tran
Primary: 0V-115V-230V-shielded wire (4 wires in total). The double group is 4 wires, if you want to use 3 wires, the two lines in the middle of the double group are 0V.