Product material: ABS+ceramic grinding head Technical features: 3-speed speed regulation, positive and negative switching, convenient charging, spotlight lighting Uses: manicure, sanding, polishing, exfoliation 1 Charging method: USB port/DC 5V 2. Working voltage: 3,7V 3. Rated power: 0.5W 4. Rotation speed: 18000, RPM 5. Adapt to the grinding head: 2,35mm 6. Battery capacity: 500mAh 7. Approximate working hours: 90Min 8. Product net weight: 53g 10. Product size: 156*21.5*20mm Three gear adjustment and direction, adjust gear position for nail surface: Different gears can be adjusted according to the condition of the nail surface. The forward and reverse can be switched by one key. The effective manicure is more labor-saving and time-saving, and novices use it without pressure. Powerful motor, sharpening and manicuring quickly: Electric drive 360 rotation action, micro motor rotates at high speed every minute Create shiny nails in 1 minute: sanding / manicure / polishing / exfoliating Ceramic grinding head, safer operation: The texture is meticulously polished to fit the curvature of the nail surface, and the armor removal will not damage the armor. Novices can easily operate it. Charging and storing No need for external power supply: Built-in 500mAh battery can be used wirelessly. USB interface charging, high compatibility. Spotlight illumination, polished more clearly: There is a lighting lamp at the head end, which lights up when the machine is turned on. Polish, polish and remove armor at a glance