This control box can be used to operate up to four LGB turnouts, signals, uncoupler tracks, or other accessories. Each momentary rocker switch operates an accessory item. This control box is connected to a source of alternating current (18 volts) by means of the connections on the rear of the control box. The 60130 Converter is required when using a switched mode power pack (51090 or 51985). An LED indicates whether the control box is being supplied with current. Color-coded connections on the rear of the control box facilitate connections. Adhesive labels are included to identify what is connected to a switch on the control box. 126 x 116 x 66 mm / 5" x 4-9/16" x 2-5/8". This control box replaces item number 51750.