Replicating a Climax Locomotive Works Class B steam locomotive, which had a horizontal boiler that was more powerful and efficient than previous T-boilers, this premium quality On30 scale model - part of Bachmann's top-of-the-line Spectrum series - features built-in DCC and sound that works on DCC or standard DC layouts; a powerful 5-pole skew wound motor; a die cast chassis; a fully outfitted steel cab with sliding side windows; a metal valve gear; a working headlight; a detailed tender with interchangeable wood, coal and oil tank loads; blackened RP25 metal wheels; magnetically operated knuckle couplers; and more. Measures 7" long and arrives ready to run on your HO scale track.