Specification: Item Type: Electric Nail Polishing Machine Product Material: Aluminum alloy Product Power: 20W Power Supply Mode: USB Product Speed: 0-30000rpm Product Features: Short and beautiful, product size design is beautiful, more in line with the posture of a woman holding a polishing pen; Size: Approx. 140 x 23mm / 5.5 x 0.9in Package List: 1 x Polishing Pen 1 x Grinding Head 1 x USB Cable 1 x User Manual 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. 3. If you have any questions or concerns after receiving the product, please feel free to contact us so we can help. 4. If the product has quality problems, we will replace or compensate you for free as soon as possible.