The machine is made of high-quality stainless steel, the high-quality material will make the machine very lasting. Beside, the workmanship is very good, so it will save you much trouble to mend it. The machine has light weight of 8KG and very portable. With full instructions in English, it will help you use it easily. Donuts’ thickness can also be adjusted by adjusting the amount of materials. The more material, the thicker and bigger is the produced donuts; the less , the smaller and thinner is the produced donuts. The operation is simple and of high efficiency. What you need do is just to put the prepared dough in the mold, close it and set the temperature and time, then the beautiful and yummy donut or cake is finished. When the machine is linked to electricity, the red light is on; when the machine is heating, the green light is on. The machine is very well welcomed and is the best choice to a variety of stores, food plants, etc. As for this machine is 220V 50HZ, so if we want to use the 380V power, we should be according to the wiring diagram in the Manual.