Features: Well-made Stirling Engine Mode: The whole body is made of high quality aluminum, the surface metal is brushed, CNC high-speed machining. The base is made of high-grade imported beech wood, and there are sponge anti-slip pads at the 4 corners. Great yo decorate your desk. 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. What an interesting toy. Easy to Operate: Fill the alcohol burner with your 95 percent alcohol (we recommend this fuel) and light it. Let the light burn the round ended cylinder for about 20 seconds, then give the wheel a gentle push. 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. Great Educational Toy: classroom or laboratory experimental teaching aids, the best choice gift to students, teachers, children, friends and colleagues.Specification:Model: LL-003-PUMain Material: Wood, Aluminum, MetalOutput Voltage: 3-5VSize: 16 x 10.2 x 8.5cm or 6.3 x 4 x 3.3inWeight: 297g or 10.5ozPackage Size: 17.8 x 11.6 x 9.5cm or 7 x 4.7 x 3.7inPackage Weight: 413g or 14.7ozPacking List:1 x Stirling Engine Model1 x Alcohol Lamp(without liquid)1 x Glass Tube1 x Hemp Rope1 x Alcohol Cap Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store