Item Type: Electric Nail Polishing Machine Material: ABS Battery Type: Lithium ion battery (built in) Battery Capacity: 500mAh Adjustable RPM: 0-20000 RPM Package List 1 x Grinder (With Protective Cover) 5 x Grinding Head 1 x USB Charging Cable 1MULTIFUNCTIONAL: Electric nail polishing machine is designed for various nail care tasks, such as removing dead skin and calluses, polishing, and shaping nails. 2FAST AND EFFICIENT: With 20000 RPM adjustable speed and multiple drill bits, our nail polishing machine can quickly and efficiently solve various nail problems. 3LOW NOISE: Nail polishing machine is designed with a low noise and low vibration level, ensuring a comfortable and quiet nail care experience. 4USB CHARGING: Nail grinding machine features a 500mAh lithium battery that can be charged fully in just few hours, offering many minutes of working time. 5PORTABLE AND CORDLESS: Electric nail polishing machine is cordless, rechargeable, and portable, making it easy to use and carry around, and ideal for salon and home use.