The GP40 was considered the top of EMD’S four-axle line when first offered in the 1960s. It was visually distinguished from earlier GPs by three radiator fans on its long hood. Bachmann’s N scale Sound Value model is SoundTraxx Econami™ equipped. Factory-set for GP40 realism, the diesel package offers a choice of 5 prime movers, 16 airhorns, multiple variations of 7 bell types, 2 air compressors, and 3 couplers plus a function-activated grade-crossing signal—all in 16-bit polyphonic sound. Econami™ includes adjustable auto-notching sensitivity for prototypical operation, adjustable master volume and individual sound effect volume levels, advanced consisting, and more. 
Features include:
DCC sound-equipped with Econami™ Sound Value package
dual-mode NMRA-compliant decoder
directional headlights with Rule 17 dimming
precision motor
flywheel
die-cast frame
fine-scale handrails
E-Z Mate® Mark II couplers, front and rear