USB Charging Wireless Engraving: cordless engraving pen can be used with recharge or connected to a power 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 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 according to your needs. Unique Design, Overload Protection: This DIY electric engraving pen is equipped with a power 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 according to different usage conditions. When the resistance is too , the overload indicator light is on, and the power supply is automatically cut off for self-protection, avoiding damage to the motor and prolonging the service life. Complete Accessories: 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 kits. Wide Application: This jewelry engraving machine supports you to , , 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: silver Material: Metal+Plastic Package Contents: 1 set x cream for glass Only 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.