Manufactured by Gaugemaster, from their decoder range, this is a DCC81 Standard Point Motor Decoder with CDU.
This is a simple point motor decoder for Standard solenoid point motors which includes a 2 wire main track or bus connection to minimize wiring. The super easy learning decoder requires no special programing when addressing and features an easy to use screw terminal block to insert your wires into. There is also a 3 pin harnes to attaches to the Surface Mounted Point Motor but with simple modification it can be fitted to other Solenoid Point Motors. The small switch on the side of the board is for setting the address of the decoder and then operating the point motor, simply set the switch to the SET mode, give the decoder an address from your DCC controller and set the switch back to RUN. The terminals on the decoder include DC or DCC Power Input, Momentry Switch Input and LED Indicator Outputs.