L-shaped Stirling engine model with USB night light and small generator, designed as a functional display piece and hands-on learning toy. Key benefits: - Provides a tactile STEM learning experience that demonstrates external combustion engine principles and simple electricity generation. - Doubles as a precise metal desktop model and working demonstration unit that draws attention with a cool, all-metal appearance. - Powers the included small night light via the built-in generator and included USB cable when the engine is running, enabling a visible link between mechanical motion and electrical output. - Requires no assembly and starts quickly, making it suitable for classroom demonstrations, hobby benches, and interactive displays. Main features and specifications: - Design and appearance: Novel L-shaped overall form with a striking metal finish that emphasizes mechanical detail and craftsmanship. - Materials: Made primarily of stainless steel and aluminum alloy with a quartz tube for the hot cylinder, and machined parts matched to high precision. - Size: 16 x 8 x 11 cm. - Colors: Available in silver and gold finishes. - Power and compatibility: The engine includes a small generator with a USB output and the package contains a USB cable and a compact night light. The generator is intended to power the supplied night light when the engine is operating. - Package contents: One Stirling engine model, one small night light, and one USB cable. Only the items listed are included. - Construction details: The base is fitted with a platform to hold an alcohol lamp for heating the cylinder. The mechanism runs smoothly and reliably due to precise part fit and quality metal construction. Operation summary: - The product arrives pre-assembled and is ready to operate. - Place the engine on the provided water platform, fill the alcohol lamp with 95 percent alcohol to no more than two thirds capacity, and light the lamp. - Position the lamp under the hot cylinder and allow about 30 seconds for preheating. - Give the flywheel a gentle manual spin to help the engine start. The running engine will drive the generator and light the supplied night light via the USB cable. Practical use scenarios: - Desk display and learning tool: Use on a home or office desk to demonstrate mechanical motion and basic power generation during study or casual conversation. - Classroom demonstration: Use in physics or engineering lessons to illustrate thermodynamics, heat engines, and energy conversion in a compact, hands-on way. - Gift for hobbyists and collectors: Present as a decorative, functional model for model builders, mechanical enthusiasts, and STEM hobbyists. Additional notes: - Color appearance may vary slightly due to lighting and screen differences. - Allowable measurement tolerance is plus or minus 1 to 3 cm. - Follow safe handling practices when using open flame fuel and hot surfaces, and use only the items and fuel specified in the instructions.