Product Description Specification: Power: 10W Voltage: 4.2V Color: Silver, Rose, Black Size: 120*16mm/4.72*0.63in Speed: 5000-10000-18000rpm Battery capacity: 300mAh Package Includes: 1Set * Engraving Pen Note: 1. Please allow 1-3cm measuring deviation due to manual measurement. 2. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Unleash your creativity: Say goodbye to those old ways that make crafting tricky. You will create easily and make what you want in minutes, Featuring the included 30 bits, unleash your creativity and personalize on wood, metal, glass, ceramic and more Low Noise: The sound of this cordless rotary tool is very low when working, even if someone is sleeping, he or she will not feel very noisy. Great for beginners and professionals to use anytime, anywhere to make unique creations that you like Speed Adjustment: The metal engraving pen is equipped with a high-quality motor. Adjust the speed in three gears, ranging from 5000 to 18000 r/min, to adapt to different situations. The lowest speed allows you to safely polish your nails, and the highest speed can also be used for metal carving Unleash your creativity: Say goodbye to those old ways that make crafting tricky. You will create easily and make what you want in minutes, Featuring the included 30 bits, unleash your creativity and personalize on wood, metal, glass, ceramic and more Low Noise: The sound of this cordless rotary tool is very low when working, even if someone is sleeping, he or she will not feel very noisy. Great for beginners and professionals to use anytime, anywhere to make unique creations that you like Speed Adjustment: The metal engraving pen is equipped with a high-quality motor. Adjust the speed in three gears, ranging from 5000 to 18000 r/min, to adapt to different situations. The lowest speed allows you to safely polish your nails, and the highest speed can also be used for metal carving Multi-Functional Engraving Kit: This hand engraving kit can be used as an electric engraving machine or a small rotating tool, allowing you to sculpt personalize or decorate almost any surface in seconds, like metal, plastic, glass, ceramic, wood, leather, diamond, stone and many more