Features: Well-made Stirling Engine Mode: The whole body is made of Zinc alloy and stainless steel, and oaken base with 4 anti-skid pads at the bottom of model machine. The fly wheel is made of metal and epoxy process, to enhance the industrial texture. Attractive LED Light: The Stirling engine equipped with a LED. As the power will go through the wire and drive the LED light to lit. Superior Performance: When the model keeps rotating, the speed is high, the performance is stable, and the rotation can be maintained for a long time. Low noise, low pollution and low operating costs. Great Educational : The glass tube and glass alcohol lamp, easy to watch piston movement directly. The best choice gift for students, teachers, children, friends and colleagues. Easy to Operate: Fill the alcohol burner with your 95% alcohol (we recommend this fuel) and light it. Let the light burn the round ended cylinder for about 30 seconds, then give the wheel a gentle push. Specification: Model: LL-009 Material: Zinc alloy, stainless steel, glass Color: Silver/ Gold/ Silver+red/ Gold+red (Optional) Size: 160x85x95mm(L*W*H) Weight: Approx 350g(Engine+Wooden Base) Output Voltage: 3.0~5.0V Fuel: 95% Acohol Package Size: 17.5 x 9.5 x 11.5cm Package Weight: 450g/15.87oz Notes: 1. The actual color of the product may have a slight difference due to different computer screens, please understand. 2. Kids should be accompanied by adult. 3. Recommend using alcohol with purity95%(prepared by buyer self) 4. HOT HOT HOT Dont touch the glass when using. 5. Be careful of the alcohol spitting out, it was very dangerous, If spitted out, dont be panic, use a wet rag to cover the fire. 6. Both ends of the connecting rod joint activities need to add regular oil lubrication, the piston can not refuel, otherwise it will not work the resistance. Package List: 1 x Engine Model 1 x Alcohol Lamp Bottle 1 x Alcohol Dropper(3ml) 1 x Spare Heating Glass Tube 1 x Led Bead 1 x English Instruction Manual