DZ-1010HO Crossing Signal- Single Unit | HO scale

NJI scale signal and our Infrared sensors and controller to give prototypical operation.
Two wires connect to power form a working signal. (9-18V AC or DC)
When the train is sensed, the gate arm to goes down and the lights bink.  
Four seconds after the train passes flashing stops and the arm goes back up. 
Arm speed can be set to FAST, MEDIUM or SLOW.