MKII Diesel Sound System

From a gentle idle to a throaty growl, add the sound of your favorite prime mover to your miniature motive power. While idling, the internal machinery clatter can be heard. As the engine moving and working harder, the diesel engine sounds grows louder. When slowing down, the sounds drop. There's also an adjustable turbocharger, which you can set to match you favorite engines. Idle sound starts at about 1.5 to 3.0 volts. Ready to install, select the speaker (sold separately) that best fits your model. Custom-integrated circuit also provides constant brightness lighting system, less bulbs. Unit is easy to install and comes with complete instructions. Small size (3/4 x 2-3/16 x 5/8") is ideal for use inside powered or dummy units.