USB Charging Wireless Engraving: Our cordless engraving pen can be used with recharge or connected to a source and is equipped with a Type-C charging cable for easy and fast charging. 30 minutes can charge to 80%, 1 hour to fully charge; Long-lasting battery used continuously for 1 hour under normal conditions.Portable & Easy to Operate: The precise grinding engraver is only 21.5 cm (8.46 inches) long and weighs only 43 g (0.09 lbs), so you can put it in any of your bags and clothing pockets. You can switch and adjust the speed with one key, there are 3 gears in , the speed of 1-3 gears is 5000-10000-18000 Rpm/Min, you can choose according to your needs.Unique Design, Overload Protection: This DIY electric engraving pen is equipped with a indicator, speed indicator, and overload indicator, which can know the usage of the engraving pen in real-time, and you can adjust the working speed you want according to different usage conditions. When the resistance is too , the overload indicator light is on, and the supply is automatically cut off for self-protection, avoiding damage to the motor and prolonging the service life.Complete Accessories: Our metal engraver pen kit includes 1 engraving pen, 30 grinding bits, 2 drilling bits, 1 post, and 3 stainless steel cutting discs,1 wrench, 1 USB cable. Simple and easy to learn, especially suitable for beginners. Make keychains, DIY necklaces, or gifts with our kits.Wide Application: This jewelry engraving machine supports you to engrave, engrave, sand, polish, etch, mill, grind, drill, cut and more on metal, glass, ceramic, leather, wood, jewelry, stone or statues work, allowing you to enjoy a relaxing hand diamond jewelry making time.colour: silverMaterial: Metal+PlasticPackage Contents:1 set x etching cream for glassOnly the above package content, other products are not included.Note: Light 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.