It could be worked on both artificial nails and natural nails.- The machine works well removing the dead skin around the nail, barb, grinding uneven nails, so that the nail surface is brighter, polishes nail edge, repair the delicate nail shape.- Light pen-shape and compact design, easy to carry, durable and convenient for repairing your finger nails and toe nails. allows you to enjoy nail art at any time anywhere.- Suitable for DIY nail art design decoration at home or professional manicure usage.- Inserting 2 AA batteries(not included) and installing grinding tool, then it can work by pushing one button.- Not only can be used by a professional person but also can be used to polish nails at home.- The high-quality Material body takes it an efficient heat dissipation and long life-span.- Size :16cm (6.30 in) - Need: 2 AA Battery.- Packing included: 1 manicure set (5 polish head, not included AA Battery)