Designed for high-speed passenger service, the first 3E2 series diesel was introduced by GM in 1937 and became one of the most popular passenger engines ever made. Each DCC sound-equipped EMD E7A is equipped with the Diesel Sound Value SoundTraxx(R) diesel sound package with prototypical prime mover, 3 air horns, and bell all in polyphonic 16-bit sound. Features include precision motor with dual flywheels, die-cast frame, all-wheel drive, illuminated number boards, operating LED headlight per prototype, RP25 wheel contours, and E-Z Mate(R) Mark II couplers.