Broadway Limited PRR K7 Stock Cars bring a new level of interest to your N Scale layout. Based on cars used to haul all kinds of livestock these sound-equipped cars feature an on-board circuit and speaker that′s motion-activated to generate cattle, hog, sheep, chicken or mule sounds as noted in the car description. Sounds operate on any DC or DCC layout. PRR K7 Stock Cars are equipped with metal wheels contoured to operate on Code 55 and larger rail and magnetic knuckle couplers.