IBE-2210 Electric Foot Grinder Bettery: Lithium battery 18650/3.7V/1200mAh Charging Time:2.5Hours Working Time: 4 Hours Waterproof:IPX5 Cord & Cordless:Yes Input power:DC5V,1A,5W Output Power:3V Rotation speed:9000RPM LED Display LED lighting Two gears Grinding speed adjust (Gear I: 1600r/min Gear II: 1900r/min) Accessories:Brush,USB Cable,grinding head *3 (Coarse/medium/fine) Product Size:158*63*38mm Product weight:162g