Well-made Stirling Engine Model: The entire body is constructed from zinc alloy and stainless steel, with an oaken base featuring 4 anti-skid pads at the bottom of the model machine. The flywheel is made of metal using epoxy processing to enhance industrial texture. Attractive LED Light: The Stirling engine is equipped with an LED. As the engine operates, power is generated through electromagnetic induction, causing the LED light to illuminate. Superior Performance: When in operation, the model rotates at high speed with stable performance and can maintain continuous rotation for an extended period. It operates with low noise, low emissions, and low running costs. Great Educational Toy: Features a transparent glass tube and glass alcohol lamp, allowing direct observation of piston movement. Ideal for students, teachers, children, friends, and colleagues to learn basic principles of heat engines. Easy to Operate: Fill the alcohol burner with 95% alcohol (recommended fuel) and ignite it. Allow the flame to heat the cylinder end for several minutes, then gently push the flywheel to start operation. Model: Engine Model Output Voltage: 3.0~5.0V Fuel: 95% Alcohol Notes: 1. Children should be supervised by an adult during use. 2. Use alcohol with 95% purity (provided by user). 3. HOT – Do not touch the glass components during or immediately after operation. 4. Exercise caution to prevent alcohol spillage or splashing. In case of spillage and ignition, remain calm and smother the flame with a wet cloth. 5. The connecting rod joints require regular oil lubrication. Do not apply oil to the piston or cylinder bore, as this may prevent proper operation due to increased resistance. Color: Silver + Wood Color Material: Zinc Alloy + Glass + Stainless Steel Package Contents: 1 x Engine Model 1 x Alcohol Lamp Bottle 1 x Alcohol Dropper (3ml) 1 x Spare Heating Glass Tube 1 x LED Bead Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.