This Nail System is the perfect and effortless way to keep your toe nails and finger nails shiny and natural looking. Battery operated with 1 AA battery (included). To power the device, REMOVE & DISCARD the red plastic film from the base of the product where batteries are housed. Kit includes 3 different insert heads that easily attach for a simple 3 step system: fill, buff, and shine nails effortlessly. Ergonomic design for use on both toenails and fingernails.