This is for a DCC light signal decoder made by LDT and can control up to four 3-aspect signals. I have added screenshots taken from the LDT website that you can visit and read up on how to use the light signal accessory decoder. Pictures of the included two page manual are also provided. It is in very good cosmetic condition and is fully working, taken off of a O guage British layout being modified. But suitable for any guage layout.

Brand: LITTFINKSI DATENTECHNIK (LDT)
Type: CONTROL ACCESSORIES
MPN: 518013
Gauge: MULTI GAUGE
EAN: DoesNotApply