Features:1.Chargeabie：Use USB Portable Charger Which Provided Whith Packing For Charging.Please Fully Charge Before Grinding.2.Double-layer stainless steel filter: pure filtration, no residue, safe and odorless, effective filtering of coffee grounds up to 99%.3.Fastable:Electric Grinding, More Convenient.Fast And Stable, Powder Is Evenly Discharged To Retained Original Coffee Aroma .4.Safety:Ceramic Grinding Core, Constant Temperature Grinding.Description:This coffee grinder is compact and portable, with exquisite design, suitable for all types of coffee makers.Specifications:Size: 7.7*7.7*22.7cmMaterial: stainless steel 304, ABSPackage Included:1 * Coffee grinderNotes:1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.