Features 1、Well made Stirling Engine Mode: The whole body is made of Zinc alloy and stainless steel, and oaken base with 4 anti skid pads at the bottom of model machine. The fly wheel is made of metal and epoxy process, to enhance the industrial texture. 2、Attractive LED Light: The Stirling engine equipped with a LED. As the power will go through the wire and drive the LED light to lit. 3、Superior Performance: When the model keeps rotating, the speed is high, the performance is stable, and the rotation can be maintained for a long time. Low noise, low pollution and low operating costs. 4、Great Educational : The glass tube and glass alcohol lamp, easy to watch piston movement directly. The best choice gift for students, teachers, children, friends and colleagues. 5、Easy to Operate: Fill the alcohol burner with your 95% alcohol (we recommend this fuel) and light it. Let the light burn the round ended cylinder for about 30 seconds, then give the wheel a gentle push. Specification Specification: Material: Zinc alloy, stainless steel, glass Color: Gold Size: Approx. 17 x 8.5cm /6.7 x 3.3in Weight: Approx 350g(Engine+Wooden Base) Output Voltage: 3.0~5.0V Fuel: 95% Acohol Package List 1 x Engine Model 1 x Alcohol Lamp Bottle 1 x Alcohol Dropper(3ml) 1 x Spare Heating Glass Tube 1 x Led Bead 1 x English Instruction Manual