the three blades air overload device with buckle upper cover Newly added"Power failure detection"device,open the cover that is power off, security upgrades! Product Name: High-speed Universal Grinder Inching Version . Voltage:220V/50HZ or110V Power:1500W?Speed: 28000 (r/min) Applicable materials: universal Material: Stainless steel Degree of comminution: ultrafine mill The water content of the material: without water crushed The max hardness of material: Radix Notoginseng, ore, pearl, etc. Application: pharmacies, hospitals, families, grain mill, pet shop, laboratory, mines etc. The shipment will be arranged in 1-3 working days( not including customized product), and takes about another 3-9 working days to reach you.