Powered by 2 x AAA battery, this electric engraver pen is a fast and easy way to protect your valuables and electronic gadgets. You can use it to engrave nearly anything you can imagine on almost any type of surface, like wood, metal, plastic material and glass. It works just like a pen, very safe and easy to use. Features - Color: Silver. - Material: Diamond+Aluminum+Electronic Components. - Size: Approx. 16 x 1.5 x 1.5cm. - Power supply voltage: 12V. - Input: 28w. - No-load speed: 12000rpm. - change mode: fixed shift. - Grinding head diameter: 2.35mm. - Chuck Size: 6mm. - Operates with 2 x AAA batteries (not included). - Engrave practically any surface: metal, plastic material, glass, leather and more. - With powerful motor, it can engraves almost any surface only a few seconds, and you only need to use your thumb over the control button to turn on the engraver pen. -Compact and lightweight. Pen size are easily to use and carry. - Use it for Arts and Crafts; identify, safeguard and easily locate your valuables such as jewelry and electronics. Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand