Don't let their small size fool you. Heislers could tackle loads, grades and conditions that no conventional steam locomotive ever could. Although most associated with the logging industry, Heisler’s worked in a variety of heavy industry and construction environments. Their flexible truck arrangement and light weight meant that rough or temporary track was no real problem. And with their gear-driven drive train, they were at their best with a heavy load. They could do just about anything - as long as you didn't want it done fast! Available for the first time in many years and now upgraded with Bluetooth and 4-digit addressing, Lionel has packed a lot into this tiny locomotive. You'll get full LEGACY sounds, dual ElectroCouplers, even whistle steam, all in a highly detailed model that will navigate an O31 curve while showing off its working drive train. Like the prototype, these models are designed to be fully appreciated at slow speeds and have "switcher" LEGACY speed tables for the ultimate in speed control. If you've never experienced the thrills of geared steam, you don't know what you're missing!