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 Pen Color: Silver, Rose Gold Material: Aluminum Alloy Size: 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: LED Speed: 5000-10000-18000 Power: 10W Battery voltage: 4.2V The package includes: 1Pc x Electric Engraving Pen 3Pcs x Cutting Disc 1Pc x Post 20Pcs x Grinding head 16Pcs x Engraving template 1Pc x USB charging cable 1Pc x English manual Note: 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.