Designed made by the European U.S.A technical standard. Intelligent circuit with 3wires and multi-pulse , Adapt to the special trigger tube to ignitor. Voltagge width :200~240V Using frequency : 50~60Hz Temperature control can be recover function,good power to resist voltage variation features , the lower disturb , steady start performance. Specification: Square-shaped plastic shells: 34X31X62 The cylinder-shaped aluminum shells: ¢ 35X62(excluding connecting ends screws)