High-quality electric engraving pen, small size, light and portable, wireless design, easy to operate. It has a wide range of applications and is very suitable for engraving glass, wood, nail polishing, and metal lettering. Features: 【Easy Charging】USB charging available. It can be charged by computer and mobile phone transformer, which brings you a lot of convenience. The charging indicator flashes when charging and always lights up when fully charged. 【Adjustable Speed】This cordless engraving pen has a power of up to 10W and a maximum speed of 18000 RPM. In the range of 5000-10000-18000 r/min, three different gears can be selected according to different materials. 【Compact Lightweight】Powerful but small and light, just like holding a pen while in use, for ultimate control and precision as well as for comfort.The mini size rotary tool allows you to take it and use it whenever and anywhere. 【One-button overload protection】One-button adjustment of different gears, and equipped with indicator lights, the operation is simpler and more intuitive. At the same time, when the resistance is too large, the electric metal etching tool will automatically cut off the power supply for self-protection, avoid damage to the motor, and be safer to use. 【Wide Applications】Our cordless engraving pens work precisely and easily on almost any surface, including glass, metal, wood, plastic, leather, jewelry, and more Allows you to customize everyday objects to create one-of-a-kind, personalized accessories and gifts. Specifications: Color: Silver / Blue / Red (Optional) Material: Aluminum + steel Charging Voltage: 5V Output Voltage: 4.2V Power: 10W Speed: 3 Gear adjustable (5000-10000-18000rpm) Chunk: 2.4mm Battery Capacity: 300mah Item Size: 140 * 15mm / 5.51 * 0.59in Item Weight: 43g / 1.52oz Package Weight: 148g / 5.22oz Package Size: 18 * 5 * 2cm / 7.09 * 1.97 * 0.79in Package List: 1 * Mini Rotary Tool 1 * USB Charging Cable 4 * Grinding Bits 30 * Diamond Burr Bits 2 * Storage Box 1 * User Manual (English)