Product: SD-Z5G High Version Stirling Motor Generator Model Overview and key benefits - Hands-on Stirling motor generator designed for DIY physics experiments, creative gifting, and technical display. - Demonstrates heat-to-mechanical-to-electric energy conversion in a compact, reliable model. - Built-in voltmeter and USB interface inside the base allow direct monitoring and connection options for experiments without modifying the unit. Why you need this - Teaches fundamental thermodynamics and generator principles through visible operation and measurable output. - Sturdy, precision-made components deliver smooth performance and long-lasting demonstration value. - Easy to operate for hobbyists, students aged 14 and up, and educators who want a practical, interactive learning tool. Main features and specifications - Model: SD-Z5G High Version. - Net weight: 480 g. - Size: 8 x 17 x 9.5 cm. - Heating cylinder material: plastic. - Flywheel and holder: quartz. - Structural components: aluminum alloy with sandblasted finish on the base and high-gloss polishing on other parts. - Precision-machined connecting rod for balanced motion and reduced vibration. - Integrated voltmeter and USB port housed in the base for monitoring output and connecting experimental loads. - LED indicator blinks during normal operation to show successful generation. Performance and operation notes - Place the horizontal double-cylinder model on a clean, level surface and increase rubber pad friction for stable operation. - Use a suitable alcohol lamp as the heat source; keep all flammable materials at a safe distance. Light the lamp, wait about 30 seconds, then give the flywheel a gentle spin to start. - LED flashes when the motor runs correctly, and the voltmeter displays generated voltage. - Do not touch the heating cylinder during or immediately after use to avoid burns. Allow it to cool before handling. Safety and handling instructions - Recommended for ages 14 and older; children must be supervised by an adult. - Alcohol fuel cannot be shipped with the product. Purchase alcohol of 75 percent purity or higher from a pharmacy or equivalent supplier. - Limit continuous operation to a short duration; do not use more than about one third of the alcohol lamp bottle per single run. - After shipment, the reagent tube may be at elevated temperature; avoid contact with skin and combustible items. Avoid contact between alcohol wicks and the tube to prevent pressure issues. - Do not apply oil to shafts or connecting rods. If lubrication is required, use pencil graphite to reduce friction rather than grease. Practical use scenarios - Classroom demonstration: Show the conversion of heat to mechanical motion and electrical output while students monitor voltage and LED behavior. - STEM hobby kit: Assemble and operate the model to learn about engine dynamics, precision machining, and measurement with the integrated voltmeter and USB. - Desktop science display: Run short demonstrations at events or science fairs to illustrate thermal engines and small-scale power generation. This SD-Z5G model combines educational value, precision construction, and integrated measurement features to deliver a practical and instructive Stirling motor generator experience.