Traintronics 3 Aspect Yellow / Green / Yellow Light Signal. TT105 This signal requires a on-on-on switch to operate or DCC Accessory decoder. Functions: Built-in Circuit Protection, Fading in - Fading out adjustment, Plug & Play interface circuit board, LEDs for low power consumption and reliability. No Soldering required. Signal identification numbers/lettering, ladder, and ladder safety ring included. Brand New
