This unit allows you to connect and integrate the Märklin Digital 6017 Booster and 6015 Booster into the Märklin Systems world. Connection options: permanently installed wires (red and brown) with C Track spade connectors. Low voltage socket for supplying power to this unit when you are only using the 6015 Booster with it. Socket for flat ribbon cable connection to the Booster. Plastic housing. Dimensions 96 x 85 x 40 mm / 3-3/4” x 3-1/4” x 1-1/2”.