BACHMANN SET THUNDER CHIEF SET WITH DIGITAL SOUND, HO SCALETHUNDER CHIEF WITH DIGITAL SOUND (HO SCALE) With the roar of its mighty motor and a blast of its horn, the Thunder Chief announces its arrival. Commanding the attention of one and all, there is no missing the excitement of the Thunder Chief storming into the station. Featuring a DCC sound equipped F7 A with a diesel sound package that includes prototypical prime mover, three air horns, and bellall in polyphonic 16 bit sound that you can control with