The #11130 Servo Controller adds servo control to DCC, AirWire, Bluetooth, or other locomotive control decoders with auxiliary/function output. Allows control of Kadee® RC Remote Couplers (factory programmed), turnouts, crossing gates, semaphores, windmills, water wheels, gondolas, trams, roundabouts, cranes, & drawbridges... Note: The #11130 Servo Controller is equipped with a On-board 250mA Relay for lighting or other remote switching needs. Specifications Operating voltage: 6 VDC - 14.8 VDC. Drive standard hobby servos. Drive continuous rotation servos. Adjustable speed. Adjustable Servo position CW & CCW. Two 200ma on-board relays.