Ceramic core-not easy to heat, no odor, prevent rust. 25-30g coffee beans need to be ground for about 2-3 minutes . Just press the button on the top to start grinding and it will stop automatically when finished. Slow Grinding-Imitates manual coffee grinding and releases your hands. Slow grinding prevents the coffee beans from heating easily and retains a better taste. Portable-weighs 350 grams, has a built-in lithium battery of 1300mAh, a USB universal charging port, can be charged. Adjustable coffee powder fineness, transparent glass storage cup, you can check the fineness and supply of coffee at any time,Suggestion: The regulator does not need to be adjusted to the highest (the coffee powder is best to keep a little particles) Low battery condition- 1. After a few seconds, the grinder turns off intermittently, then you must press the button again, or 2. The power indicator is red.In both cases, please charge. Product name: Electric coffee bean grinderBattery capacity: 3.7V/1300MAH batteryWeight: 336gMaterial: PP material + ceramic corePackaging: body + cleaning brush +TYPE-C charging cableStyle AdjustableRecommended Uses For Product Grinding