This switched mode power pack is for connecting to and supplying power to the 60114 or 60116 Track Box. The input is 120 volts / 60 Hertz / the output 18 volts / 36 watts DC voltage. The switched mode power pack is authorized for use by children and comes in a plastic housing. Dimensions 85 x 55 x 74 mm / 3-3/8" x 2-1/8" x 2-7/8". Connections: Hollow socket 5.5/2.5 mm, positive conductor inside. The 66367 switched mode power pack is designed for use only indoors.