1. Stepless speed regulation, five-speed adjustment, one-key switching of speed gears, better control of polishing strength. 2. Non-slip pen body, ergonomic design, comfortable to hold and use. Adjustable forward and reverse rotation. 3. High-torsion motor, maximum speed 20000rpm, low noise and low temperature, efficient polishing. 4. With 7 metal polishing heads and 4 quartz polishing heads, meet your different needs, easy to replace. 5. Simple and elegant appearance, light weight and in small size, easy to carry, suitable for home use and nail salon. Spec: Condition: 100% Brand New Item Type: Nail Drill Material: ABS Power Supply Mode: USB Power: 10W Battery Capacity: 2600mAh Speed: (Five Gears) up to 20000rpm Host Size: Approx. (Diameter) 9 x 3.5cm / 3.5 x 1.4in Features: Fast speed, compact and convenient, multifunctional Uses: Household, nail salon, etc. packing list: 1 x Host 1 x Polishing Pen 7 x Metal Polishing Head 4 x Quartz Polishing Head 6 x Sanding Band 1 x USB Cable 1 x Polishing Pen Cable Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.Simple and elegant appearance, light weight and in small size, easy to carry, suitable for home use and nail salon. Non-slip pen body, ergonomic design, comfortable to hold and use. Adjustable forward and reverse rotation. With 7 metal polishing heads and 4 quartz polishing heads, meet your different needs, easy to replace. High-torsion motor, maximum speed 20000rpm, low noise and low temperature, efficient polishing. Stepless speed regulation, five-speed adjustment, one-key switching of speed gears, better control of polishing strength.