I just received this little K LINE gem recently, no sound, conventional operations only, i wanted sounds sometimes, no going to install fancy sound boards and speakers (price of engine doesn't justify extras) finally figured out E unit , so it will run forward only, so....... I added a KOA* boxcar with diesel sound to enhance train consist.
* originally a Lionel NYC PacemakerRailsounds boxcar from the 90's retro,right. LOL,