Feature: 1. WITH LED BULB: The stirling engine equipped with a LED bulb. Because of the heat from high grade alcohol, the engine will run madly and create the electricity. The power will go through the wire and drive the LED bulb to emit light. It's really interesting and imaginative toy. 2. DURABLE MATERIAL: The board is made of pine, using fine grinding manufacturing; stent using mold steel manufacturing, stable and firm; flywheel, ventilation pistons, aluminum fine cars, fine milling, texture and beauty double combination; rod made of stainless steel manufacturing; dynamic link sets of aluminum alloy cylinder, power cylinder and the power piston is material fine grinding surface of special treatment, high hardness. Do not wear high speed ultra long running. 3. EASY OPERATION AND LONG LASTING: 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 20 seconds, then give the wheel a gently push, it will run like a charm. It can run for 8+ hours continuous without any broken. 4. STRONG PACKING: Glass tube is packaged separately with bubble bag to avoid damage during shipment. Easy to take off the package and put it back to the place. Wood base is bare. You can fly your imagination and stain it the color you prefer yourself or with kids, friends. 5. IDEAL GIFT: It is an amazing and fantastic gift. Its elegant gift package makes it spruce up and presentable. It has a wide range of application as, great present for kids' science project, physical and mechanical learning, teacher's demo props on the class, birthday present for friends, families, parents, kids, etc. Specification: Item Type: Sterling Engine Model Product Material: Aluminum Alloy, CNC Base Plate, Glass Product Size: Approx. 17.5x9.5x11.5cm / 6.9x3.7x4.5in. Package List: 1 x Instruction Manual1 x Model1 x Alcohol Cylinder1 x Alcohol Wick Rope1 x Alcohol Cylinder Cover1 x Cord Clamp LED Bulb1 x Dropper1 x Bulb1 x Glass Tube1 x String Light Note: All data are measured manually, and there are certain errors in the measurement results.