Feature:1. Practical Use: Manual operation, you can observe the entire running process of the Stirling engine, understand the Stirling principle more intuitively, and broaden the interest in learning physics.2. Multi Purpose: Mini engine kit can be used as a demonstration prop for physics and machinery learning, and it is also an exquisite high end gift for children and friends.3. Compact Structure: Stirling generator is small in size, compact in structure design, exquisite appearance, beautiful and textured, and does not take up space for storage.4. Fine Workmanship: Stirling engine is finely polished, the surfaces are very smoother and shiny, and the color is bright, not easy to rust and discolor, and has a high end texture.5. Easy to Use: The product itself has been assembled and can be used directly. Its excellent quality and exquisite appearance also make it have a high collection value and can be used as a high end gift.Specification:Item Type: Stirling EngineMaterial: Zinc AlloyVoltage: 12VSize:Approx. 16.9cm / 6.7inApprox. 12.3cm / 4.8in.Package List:1 x Stirling Engine3 x Elastic Rope2 x Alcohol Lamp2 x Alcohol Cotton1 x Light Bulb1 x LED Screen1 x String1 x User ManualNote:1.Please purchase 2 magnets separately and place them under the alcohol lamp, so that the alcohol lamp will not run.2.The color of the bungee cord is shipped randomly.