Features: Stirling engine model with fashion appearance, delicate and beautiful. It is already assembled, saving assembly time and using it faster It can also be used for DIY modification. Portable, easy to carry. It is mainly made of metal materials, smooth and comfortable touch feel, high quality and durable. Precision glass power cylinder. Add alcohol with purity more than 95percent , fire the alcohol lamp, preheat the tube approx. 10-15 seconds, turn the big wheel, and the machine will work. The speed is about 2000 rpm. With 4 anti-skid pads at the bottom of model machine, ensure stable operation. It can be used as a special artwork for home and office decoration. Classroom or laboratory experimental teaching aids, it is an educational gift for students, teachers, friends and colleagues. Specifications: Model: QX-SL-03 Color: Green Material: Metal Item Size: 12.0 * 6.0 * 8.2cm / 4.7 * 2.4 * 3.2in Item Weight: 370g / 13.1oz Package Size: 18.0 * 10.0 * 12.2cm / 7.1 * 3.9 * 4.8in Package Weight: 493g / 17.oz Notes: Using alcohol with purity more than 95percent . Please read the user manual carefully before using. Using a cap to suffocate the alcohol lamp, never blown by mouth or spit water to douse. If the alcohol spitting out and was fired, don"t be panic, use a wet rag to cover the fire. Packing List: 1 * Stirling Engine Model 1 * Metal Alcohol Lamp(without liquid) 3 * Allen Wrench 1 * Bottle 1 * User Guide(Chinese, English) ?