Model: The signal has an integrated electronic signal circuit and 1 separate signal decoder. Control of all functions is possible in the digital system with the signal decoder included with the signal, or with a conventional control box. The signal decoder can be installed under C Track or under the layout. For digital operation, the configuration and the address can be assigned and tested before the installation. Connections for controlling train movements and for 1 distant signal are on the signal decoder. Height without base 78.0 mm /3-1/16".