Features DURABLE AND STABLE The electric engraving pen has built in safety protection circuit board and intelligent overload protection chip, can automatically cut off the power supply to prevent damage when the working resistance is too large SPEED ADJUSTMENT The power of electric engraving pen is up to 10W when working, and the speed is adjustment in 3 levels, which can be adjusted within the range of 5000‑18000RPM per minute, suitable for different materials. WITH LOW NOISE This engraving pen allows you to customize items and create a personalized accessory or gift, has low working noise, do not worry about affecting the rest of the family. EASY TO OPERATE The engraving pen is lightweight and compact, built in battery and rechargeable, comes with USB cable, can be carried anywhere, easy to use, perfect for beginners or professionals. EFFICIENT ENGRAVING This improved high performance motor has better control and handling than other motors on the market, lightweight aluminum frame and ergonomically handle provide you precise fingertip control. Specification: Item Type: Electric Engraving Pen Material: Aluminum Alloy Model: E108 Battery: 1 x 4.2V lithium battery (Built in) Battery Capacity: 300mAh Speed: 5000rpm (low speed), 10000rpm (medium speed), 18000rpm (high speed) Power: 10W Package List: 1 x Electric Engraving Pen 20 x Grinding Head 1 x Charging Cable 1 x Grinding Head Storage Box 1 x Manual Note: If you need to work for a long time, the machine can be used while charging. Package List 1 x Electric Engraving Pen 20 x Grinding Head 1 x Charging Cable 1 x Grinding Head Storage Box 1 x Manual