|The light changes from red to green as the train goes by, and operates with a pressure plate or insulated track section. Boxed version includes a 153c contactor. Features; black plastic base, black ladder, black two-lens lamp hood, red and green pin-base bulbs. A remake of the postwar #148 dwarf signal from 1957.10.07.01.0330 For Fastrack users, you need the 6-14111 153IR Infrared Operating Controller, or 6-12029 Accessory Activator Pack. Both sold separately.