transformer: high quality,different models available, for low voltage halogen lamps transformer:High quality, for low voltage halogen lamps 30-40W 100V-127V 50-60HzShape: 26*28mm Tw: 130Inductive: 0.55Packing: 225*170*146mm (20pcs/ctn)We also have other different models available for your choice.Hight quality with lower prices. transformer