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 Engine Material: Zinc Alloy Voltage: 12V Size: Approx. 16.9cm / 6.7in Approx. 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 Manual Note: 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.