Feature 13 Speed Settings: The variable speed cordless rotary tool can be adjusted to 3 different speeds at 5000, 10000, or 15000 rpm to meet your different needs. Multiple Purposes: Suitable for engraving, sharpening, grinding, polishing, and sanding. This power rotary tool is ideal for use on wood, plastic, tile, glass, stone, and metal. Long Battery Life: The upgraded lithium-ion battery provides extended runtime and features fast charging technology. Convenient micro USB charging allows for charging anywhere, anytime. Various Accessories: This power rotary tool comes with 26 accessories, making it perfect for a variety of light-duty projects. Compact and Lightweight: Powerful yet small and light, designed for precise control and comfortable use, similar to holding a pen. Item Type: Electric Grinder Pen Material: ABS Battery: 1 x 3.6V 18650 650mAh Li-ion battery (built-in) Rotational Speed: 5000, 10000, or 15000 RPM Charging Interface: Micro USB (DC5V) Package List: 1 x Electric Grinder Pen, 26 x Accessories, 1 x USB Cable, 1 x Instruction Manual