This motherboard is designed to replace the existing circuit board in a Proto 2000 steam locomotive.
This board is designed to receive a WOW121 or EU621 decoder and provides an onboard Keep-Alive (KA2 style) for uninterrupted performance over troublesome tracks.
This board includes onboard resistors for all of the LED solder pads.
NOTE: this product does not function without a decoder. Use a TCS EU621 or WOW121 Steam sound decoder.