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, enhance the industrial texture.Attractive LED Light:The flywheels will rotate , making the generator's Lamp bulb lighting. When the , it will be very shocking and attracting eyeballs.Superior Performance:Dual cylinder engine is full of power and the voltage can reach 3.0-5.5V.Great Educational Toy:The glass tube and glass alcohol lamp easy to watch piston movement directly. The best 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 , then give the wheel a gentle push.Model:Stirling Engine Kit Hot Air Motor ModelOutput Voltage:3.0-5.0VFuel:95% AlcoholNotes:1.Kids should be accompanied by adult.2.Recommend using alcohol with purity95%(prepared by buyer self)3.HOT! HOT! HOT! 't touch the glass when using.4.Be careful of the alcohol spitting out, it very dangerous, If spitted out, 't be panic, use a wet to cover the fire.5.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.Colour:Gold & wood colorMaterial:Zinc alloy + glass + stainless steelPackage Contents:1 x Engine Model2 x Alcohol Lamp (no alcohol)1 x Alcohol Dropper(3ml)2 x Spare Heating Glass Tube2 x LED Bead1 x LED Light String1 x English instruction manualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.