Features 1、With large size LED display, you can clearly see the speed, power, and steering of the drill pen, which is very convenient. 2、The speed is adjustable, the speed is clearly visible, as long as the direction is slightly rotated, the speed can be changed. 3、Rechargeable design, built in 4000mAh high capacity battery, which can last up to 6~8 hours on a single charge. 4、Adjustable 0‑35000rpm, you can start using it slowly when you get used to it, forward and reverse rotation directions make it easy to use. 5、Can be used to polish, polish, remove nails, exfoliate, and engrave arcs. Various manicures, accessories, beauty and other operations. Specification Item Type: Nail Drill Pen Material: ABS Product Power: 36W Power Supply Mode: USB Product Speed: 35000rpm Battery Type: Lithium Battery (Shipped with Built in Battery) Battery Capacity: 4000mAh Battery Time: 6~8 Hours (Idling) Product Functions: Functions Such As Nail Grinding, Polishing, Nail Removal, Exfoliation, and Arc Carving. It is Used for Various Manicures, Accessories and Beauty Operations. Package List 1 x Host 1 x Nail Drill Pen 6 x Polishing Heads 6 x Polishing Circles 1 x Penholder 1 x USB Cable 1 x User Manual