Intelligent Power-Off Protection: Rechargeable USB Type-C charging metal engraver pen with a built-in overload protection chip. Automatically powers off when resistance is too high to protect the device and extend the service life of the engraving tool. Variable Visible Speed Adjustment: Electric engraving pen with a speed range of 500018000 RPM, suitable for engraving various materials. Ergonomic design provides precise control and comfortable handling. Low Noise Operation: This cordless engraving tool operates quietly, making it ideal for use at any time and in any environment without causing disturbance. Suitable for beginners and experienced users alike. Built-in Safety Protection: Features a safety protection circuit board and intelligent overload protection. Automatically cuts off power when working resistance is too high to prevent damage to the engraving pen. Work Rate: 10 Watt Rated Voltage: 4.2 Volts Rotational Speed: 5000 - 18000 r/min Suitable for use on metal, plastic, glass, ceramic, wood, leather, stone, and other materials. Compatible with various bits for engraving, carving, sanding, polishing, routing, grinding, drilling, and cutting. Color: Silver Material: Metal Size: Collet Size: 3/32 inch Package Contents: 1 x Engraving Pen 1 x USB Charging Cable 1 x Polish Bit 2 x Drill Bits 3 x Saw Bits & 1 Connecting Stick 30 x Engraving Bits 2 x Stencils Note: Light reflection and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.