RailKing R142 5-Car Subway Set11™Proto-Coupler OperationThis locomotive is equipped with one or more coil-wound Proto-Couplers forremote uncoupling action. Because Proto-Couplers are controlled through theProto-Sound 2.0 microprocessor, they do not require an uncoupling track sectionor modification to your layout to function. You can fire a coupler from neutral orwhile in motion. Use the code shown below to fire the coupler(s).Rear Coupler:To fire the rear coupler, quickly tap the Bell button once followed by three quicktaps of the Horn/Whistle button, allowing approximately ½ second to lapsebetween each quick button press. The sound of the liftbar and air line depletionwill play, and the knuckle will be released.FireRearCoupler=Bell Horn/WhistleHorn/WhistleHorn/WhistleFront Coupler:To fire the front coupler (if your engine has one), quickly tap the Bell button oncefollowed by four quick taps of the Horn/Whistle button, allowing approximately½ second to lapse between each quick button press. The sound of the liftbar andair line depletion will play, and the knuckle will be released.Speed Control:M.T.H. engines equipped with Proto-Sound 2.0 have speed control capabilities thatallow the engine to maintain a constant speed up and down grades and aroundcurves, much like an automobile cruise control. You can add or drop cars on therun, and the engine will maintain the speed you set.While the engine is programmed to start with the speed control feature activated,you can opt to turn it off. This means the engine's speed will fall as it labors up ahill and increase as it travels downward. It is also affected by the addition orreleasing of cars while on the run. Because the engine will run more slowly at agiven throttle voltage when speed control is on than when it is off, you shouldadjust the throttle to a lower power level for operation with speed control off toavoid high-speed derailments. When speed control is off, the volume will drop toallow for better low voltage operation.FireFrontCoupler=Bell Horn/WhistleHorn/WhistleHorn/WhistleHorn/Whistle