circuitron 5401 ar-2 auto reverse

Circuitron -- AR-2 Automatic Reverse -- With Adjustable Delay -- Same as AR-1, but with adjustable delay to hold train at sensor before reversing. Adjustable delay from one second to over one minute. Can be connected to pushbutton or DT-4 to permit stops and delays without reversing. Requires 12-18V DC power supply. Constructed on 3 x 3" printed circuit board.