【Upgraded Safety Protection Lid】Open-Cover-Stop type grain grinder will automatically stop working when its lid is opened, largely enhancing use security. There are two induction switches in the buckles on the both sides, which make the mill get started only when the lid is closed completely. So if the grinder cannot turn on the first time, please adjust the lid like steps in image 5. 【270°Swing Superfine Power Mill】Normal grains only needs 30s to be ground into 70 to 300 mesh superfine power, except hard material takes 2-3min to grind. Swing type design not only improves grinding effects but also makes pouring more convenient. 【High Power & High Speed】Capacity: 800g, Power: 2400W, Speed: 28000r/min, Working Time: no more than 3min. *NOTE: Material ground one time must cover the long blade in the middle and NO MORE THAN 2/3 of the tank. 1/2 of the tank is the best. The whole process of high-speed grinding is carried out in the closed tank, which will generate heat. So It is normal for the machine to be slightly heat. 【Various Dried Materials Applicable】The grinder can deal with various dried materials, including ①grains (soy, corn, barley, rice, wheat, oats, rye, peas, mung beans, coffee beans), ②spices&seasonings (star anise, fennel, pepper, cinnamon, rosemary) ③herbs (ginseng, astragalus, medlar gelatin, gastrodia, Shijie, Ganoderma lucidum) *When using grinding machine for panax notoginseng, pearls and other tough items, please slice them to small pieces first. 【OVERLOAD PROTECTOR】When grain grinder is in an overloaded/overheat state, the overloaded protector will work automatically to stop the operation. It's easy to solve by replacing the carbon brushes on the both sides and then pressing the overload protector again, then the grinder could work well. 【USE TIPS】1. Our grinder can only be turned on after the lid is fully buckled. Please follow the steps of How to Close Lid on manual, video or listing image 5; 2. The materials ready for grinding must be DRY enough; 3. Rest the machine for 5-10 minutes after every 3 minutes operation. We will provide you with the best products and services. If there is anything we can help with, warmly welcome to contact us. 【WARRANTY & SERVICE】All CGOLDENWALL grain grinders enjoy one year warranty and professional after-sales service. We also provide a Troubleshooting Guidance video for your reference ***Materials with HIGH OIL CONTENT like peanuts, walnuts are not suggested to be ground as they may stick to the blades when grinding.