Intelligent control system, built-in intelligent speed control chip to prevent overheating and combustion, shell insulation material, double protection. No need for power adapter Type-C port for quick charging, large-capacity lithium battery, providing more powerful power and longer battery life. Metal precision chuck, with built-in precision bearings, has higher running concentricity and the grinding head does not shake or shake, making the clamping more stable and reliable. High-performance motor, high speed, continuous strong power, easy to handle various materials. Suitable for engraving, drilling, lettering, grinding and polishing, etc., and can be used on marble, jade, wood, plastic, metal and other materials.