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Engine Model, Double Cylinder Mini Hot Air Stirling Engine Motor Model Colorful LED Electricity Power Generator Educational Science Kit for Kids Children

<ul><li>Physical experiment model, the glass tube and glass alcohol lamp make it easy to watch piston movement directly.</li><li>A few steps for easy use. Low noise, low pollution and low operating cost.</li><li>Hot air driven. Comes with LED bead and LED light string to show the effects.</li></ul>

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/> 1. Check the air tightness and whether the glass is broken:  &nbsp;&nbsp;&nbsp; No broken glass tube;  &nbsp;&nbsp;&nbsp; Turn the big wheel, with resilience force means normal.  2. Light the alcohol lamp, preheat the tube for about 30s (very important), turn the big wheel, the engine starts working.    How to change LED bulb to light string (refer to instruction manual video):  1. Remove LED bulb from motor completely.  2. Remove the insulation on light string's long connection end by fire.  3. Test the connection polarity: turn the wheel, light on means the connection is right; otherwise you need to change the connection direction.  4. Take off the motor belt, light the alcohol lamp, preheat for 30s, and test the function.  5. Hang the belt, turn the wheel, and engine starts working.    Note:  1. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding.  2. Kids should be accompanied by adult.  3. Recommend using alcohol (not included) with 95% purity.  4. HOT! HOT! HOT! Don't touch the glass when using.  5. Be careful of the alcohol's spitting out, it's very dangerous. If spitted out, don't be panic, use a wet rag to cover the fire.    Specifications:  Color: Gold/ Silver (Optional)  Material: Wood + Zinc Alloy + Stainless Steel + Glass  Output Voltage: 3.0-5.5V  Fuel: 95% Alcohol  Engine Size: 170 * 95 * 73mm / 6.69 * 3.74 * 2.87in (L * W * H)  Engine Weight: Approx. 560g / 1.23lbs  Package Size: Approx. 19.5 * 11 * 15cm / 7.68 * 4.33 * 5.91in  Package Weight: Approx. 750g / 1.65lbs    Package List:  1 * Engine Model  2 * Alcohol Lamp (without liquid)  1 * Spare Heating Glass Tube  1 * LED Bead  1 * LED Light String  1 * English Instruction Manual (operation video contained)