Perfect for hobbyists and scale model enthusiasts seeking to add immersive, realistic engine sound effects to their remote controlled trucks, construction equipment, and industrial vehicle replicas Featuring 3.6V-8V input and powerful 5W loudspeaker driver, this module delivers clear, thunderous engine sounds while adapting to various remote controlled model power configurations intelligent frequency response with our engine sound module, which automatically adjusts the engine sound frequency when throttle input changes, simulating authentic acceleration and deceleration Easily install this sound module between your receiver instantly upgrade your model authenticity with resonant engine sounds that respond dynamically to throttle control Transform moving scale model—including trucks, tanks, and heavy machinery—into dynamic exhibits with engine sound effects during exhibitions, races, or casual play, Manufacturer: Greabuy