Features： 1、Adopts LCD screen, clear display of rotation direction, speed, battery remaining capacity, convenient for use. 2、Pen holder design, can be placed on both sides, bilateral pen holder buckle, considerate design. 3、Power bank function, not only the polishing pen power supply, but also can be used to charge mobile phones. 4、Rechargeable design, built?in 3000mAh large?capacity integrated battery, which can last up to 12 hours on a single charge. 5、Adjustable rotating speed 0?35000rpm, rotate the knob to adjust the speed, meet your different needs. 6、Forward and reverse rotation directions make you feel easy to use left and right hands for nail polishing. Specification： Condition: Item Type: Nail Drill Material: ABS Power: 40W Power Supply Mode: USB Product Speed: 35000rpm Battery Type: Built-In Battery Battery Capacity: 3000mAh Charging Time: 4 Hours Endurance Time: 12 Hours Product Function: Functions such as nail grinding, polishing, nail polish removal, dead skin removal, carving radian, etc. It is used for various manicures, accessories and beauty. Product Features: LCD high-definition display / can be used as a power bank / bilateral buckle Host Size: Approx. 69 x 23 x 138mm / 2.7 x 0.9 x 5.4in Steps for Usage: 1. Power on: long press for 1 second; power off: long press for 1 second 2. The USB charging port can provide mobile phone charging function. 3. Forward and reverse display: the default forward rotation "F" when power on, press the power button to reverse "R", and press the power button to return to forward rotation. 4. Rotate clockwise to increase the speed; rotate counterclockwise to decrease the speed. Package List： 1 x Host 1 x Polishing Pen 6 x Polishing Head 1 x Pen Holder 6 x Sanding Band 1 x Type-C Cable 1 x Polishing Head Connection Line 1 x Manual