Features 1、From 5000rpm to 12000rpm, 3 variable speeds will make your artwork DIY creation a breeze. 2、The ventilation holes on the body will dissipate the heat, extends the battery life, safe to use. 3、This grinder can be applied in engraving, sharpening, grinding, polishing, sanding, and so on. 4、Also suits perfectly for wood, plastic, ceramic tile, glass, stone, metal and many other materials. 5、For light work, and equipped with overload protection to ensure safe operation and working. 6、Soft rubber handle is comfortable to hold, easy carrying allows for using at anytime, anywhere. 7、The USB port and the USB charging cable make charging much easier. It can work for 90 minutes after being fully charged for 2 hours. Specification Item Type: Mini Electric Grinder Speed: 3 gears (5000-12000 RPM). Power: 5W Battery Voltage: 3.6V Battery Type: Lithium Battery 18650 Battery Capacity: 700mAh (built in) Charging Voltage: 5V Collet Diameter: Approx. 0.5 ~ 3.2mm / 0.02 ~ 0.13in (change the chuck yourself). Package List 1 x Mini Electric Grinder 1 x Charging Cable(Random Colour) 4 x Sanding Sleeve 1 x Sanding Sleeve Reel 5 x Collet 5 x Flint Grinding Head 2 x Grinding Needle(Random Style) 5 x Grinding Wheel 1 x Grinding Wheel Connector 2 x Wool Wheel 1 x Wool Wheel Connector 1 x Metal Brush 2 x Plastic Brush 5 x Drill Bit 1 x Accessory Storage Box 1 x User Manual