This metal engraver pen equips with an excellent motor and a Lithium battery and is rechargeable by a USB interface., power up to10W while working The engraving pen has a power indicator and an overload indicator, which can know the usage of the engraving pen in real time Portable and simple machine for any such as jewelry, wood, plastic, glass, leather, metal and stone engraving 3 speeds: 5,000 to 18000 RPM output makes the rotary tool more prominent. Three gear selection can apply to different situations precisely, and make your projects easier and more professional. Clamping Range: 2.35mm Chuck Depth: 25mm Rotational Speed: 5000-10000-18000 Power: 10W Battery Voltage: 4.2V Battery Capacity:300mah Weight:40g Length:120mm Width:16mm Color:Rose Gold Material:Metal Package Contents: 1 * Engraving pen 1 * USB power cable 2 * Drill bits 3 * Saw blades 30 * grinding head 1 * Connecting rod Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.