1. 52 types of accessory heads to meet various application scenarios: engraving/polishing and rust removal/fine grinding/sanding and polishing 2. Automatic spindle lock design: locks immediately upon shutdown, allowing for quick and convenient head changes. The removal of the spindle lock button prevents accidental activation, providing a safe and secure creative space. 3. 1000mAh large-capacity battery, providing approximately 40 minutes of continuous operation on a full charge. LED display shows gear and battery level at a glance. 4. 30000 r/min high speed, fan-cooled motor for rapid heat dissipation, six-speed adjustment for precise control. 5. Product dimensions: 194 x 36mm 6. Power source: Smart lithium battery 7. Grinder voltage: 8V 8. Grinder motor: Permanent magnet motor 9. Speed ??adjustment gears: 6-speed adjustment 10. Chuck specifications: 2.3mm/3.3mm 11. No-load speed: 5000-30000 r/min 12. Product net weight: 225g