The Terra Sonic Support Crawler features a Hydrostatic Transmission to harness the most economical use of the engine’s full power. All steering maneuvers can be executed with a pair of single-hand control levers. Two speed ranges can be selected with a flip of the toggle switch. The H.S.T. system completely eliminates the need for clutch and gear controls, making the Terra Sonic Support Crawler highly maneuverable. Rubber tracks allow for speed, a smooth ride, and the traction of a steel track.