POWER: The powerful 20000 rpm motor of the engraving pen is powered by 2 AAA batteries and can engrave on metal, wood, plastic, leather, ceramics. HIGH QUALITY: The engraving machine head (1mm) is made of high-strength diamond, which is super wear-resistant and impact-resistant, and has a longer service life. The body is made of aluminum. The compact engraver has an ergonomic tri-lobal grip and precise fingertip control. EASY TO USE: Hold the DIY engraver pen like a pencil with your thumb over the control button, applying light pressure to the surfaces. DESIGN LIGHTWEIGHT AND ERGONOMIC: Cordless Engraving Pen small in size, lightweight and easy to carry, you can hold the precision carving engraving tool like a pen to do intricate work without undue stress on your wrist or hand. BATTERY: The mini engraving pen is portable. Electric Engraver Pen with pocket clip design is convenient to carry. Due to delivery safety, batteries are not included (requires AAA batteries). Specifications: Size: 6 x 0.6 x 0.6 inch Model: IM-412 Rated input power: AAA battery No-load speed: 12000 rpm Piston stroke length: 0.08 inch Baseplate diameter: 0.08 inch Number of revolutions: 12000 rpm Power type: Two AAA batteries Rated voltage: 1 V