oltage: 3.7V Speed: 32000 RPM Body Material: 304 Stainless Steel Clip Head Diameter: 2.35mm/0.09 inch Battery: 1000mAh 10440 Rechargeable Li-ion Battery (Included) Product Size: Approx.140 x 12 mm Net Weight: 65g  Features: ●Lightweight and easy to carry. ●Engraving tool engraving kit is required for DIY engraving and grinding. ●Use high-speed motor, 32000r/min, with silicone cover, skid resistance. ●Perfect electric drill for cutting, engraving, milling, grinding, polishing, removing and drilling. ●Manual sculpture, polished jade, stone, glass, wood, computer case, circuit board, PC material drilling. ●It is ideal for kinds of material engraving and grinding, such as wood, stone, peach-pit, egg, crafts, glass,ceramics, and etc.  Package Included: 1 x Engraving Pen(Battery Included)  1 x Charger  2 x Anti-skid Silicone Covers  2 x Carving Heads  1 x Mini L Shape Spanner  1 x Inner Hexagon Screw  1 x Wooden Box