The locomotive is factory sound fitted and run smoothly in both directions and at times the Sam‘s work correctly. I believe that there is an error in the programming of the Chip which means that sometimes the locomotive does not follow the digital instructions, hence the low price. I have a reset the engine to number three and after a proper reset or with some reprogramming it may work fine. There are no returns accepted for this item. Overall, the locomotive is in a good condition, please see images of what is included in the sale.