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Name: Lithium Battery Grinding Pen Color: Blue Material: ABS Voltage: 3.6V Battery: 700mAh Speed: 0-15000rpm/min Chuck size: 3mm Gear adjustment: 3 adjustable gears Scope of use: DIY, carving, handmade production, etc Product functions: polishing, grinding, cutting, rust removal, drilling, etc Product features: *3-speed adjustment, maximum speed can reach 15000rpm/min. *One machine is versatile and can be used in various scenarios with different accessories. *USB charging, built-in lithium battery, can be used freely. Attention: After receiving the product, please check for any issues before fully charging it for use. Product size: 152 * 31 * 28mm Packing list: 1 * Electric grinding pen 1 * Grinding head 1 * Charging cable