This is the desktop internal combustion engine that generates 2,000 rpm. Crafted from solid brass, stainless steel, and aluminum by a German engineering company, the engine has a precisely calibrated carburetor, spark plug, and piston that generate maximum mechanical energy in a smooth, efficient manner. Fueled by butane (available at camping stores), the engine starts by turning its flywheel. A piezo magneto is attached to a timing disk that sends an electrical impulse to the spark plug, igniting the fuel within the cylinder. An adjustable fuel valve controls the engine's speed and the simple yet elegant movement of the valve rod, cross head, and crankshaft are clearly visible at lower revolutions. The whir of the engine is equal to that of a kitchen blender and the dual exhaust pipes emit a non-toxic, invisible gas that quickly dissipates in a ventilated room. Runs for 15 minutes on a full tank. Minor assembly. 7" L x 4 3/4" H x 4 3/4" W. (4 3/4 lbs.)