Features:1. Multi-speed speed regulation: The switch button is cycled in the 1-3 gears, and the 4th gear is the load display to prevent the grinder from being damaged.2. Protection function: It has temperature control protection, charging protection and overvoltage protection to prolong the service life of the grinder.3. Anti shake: The tight chuck is firmly clamped, the rotating spindle is tightly connected, and the concentricity is high, ensuring precise drilling and engraving.4. USB charging: Built-in 300mAh rechargeable battery, large battery capacity, long battery life after full charge, you can use computer, power bank and other equipment to charge the grinder.5. Applicable scene: It can be used for grinding/polishing/engraving/drilling/cutting and other grinding work, mold polishing and grinding, handicraft trimming and shaping, die-casting deburring and other industries.Specification:Product Name: Electric Engraving PenColor: Silver, Rose GoldMaterial: Aluminum AlloySize: About 120*16 mm/4.72*0.63 inch (L*W), 2.35 mm/0.09 inch (clamping range), 25 mm/0.98 inch (clamp depth)Power by: 300mAh rechargeable battery (included)Display: LEDSpeed: 5000-10000-18000Power: 10WBattery voltage: 4.2VThe package includes:1Pc x Electric Engraving Pen3Pcs x Cutting Disc1Pc x Post20Pcs x Grinding head16Pcs x Engraving template1Pc x USB charging cable1Pc x English manualNote:1. Due to the light and screen difference, the item's color may be slightly different from the pictures.2. Please allow 0.5-2 cm differences due to manual measurement.