1Rechargeable: With USB charging, convenient and carefree, no need to change batteries frequently. Simply connect the sanding pen to a USB charger or computer for charging, then it can be applied for a long time, saving the time and cost of replacing batteries. 2Linear Light Design: The grinding pen is more comfortable and stable in the hand grip, easy to operate, not easy to slide, so that the application is more accurate, which not only improves the user experience, but also enhances the professional feeling of the grinding effect. 3Multifunctional: The handheld design makes it more convenient and flexible to use, more comfortable and easy to operate, lightweight and portable, polishing manicure anytime, anywhere. It can be applied for trimming nails, polishing the nail surface, trimming the nail shape and other aspects, to meet the different needs of the user's manicure. 4Fast Colour Fixing: Fast colour fixing, users do not need to wait for long drying time, can quickly complete the nail painting and polishing steps, so that the effect of nail art is more beautiful, showing the perfect charm of the fingertips. 5Adding Fun to Manicure: Suitable for home or nail salon use, the practical design and multifunctionality bring users more nail polishing possibilities, making nail care no longer a tedious task, but a relaxing and enjoyable fun and enjoyment.