Very easy to install and to program these train tech one touch signals operate only with dcc ccontrol and require only two wires. Solder one to each track for power and program the in built dcc pcb using a short bridge wire to activate the "learn" mode. Using my gauge master prodigy controller accessory function button and select a two digit identification its easy to set the red green operation. Repeat the process for the other signal arm and its fully operational. Make a note of the ID's you have selected