Application Method 1.Open the battery cover, and insert 3pcs AA batteries as per the polarity instructions. 2.Gently squeeze the Press Points on both sides of Storage Box to open it. Select the attachment you want, and insert it into the main body. Metal Tool: Grind the hard cutin on the natural nails for the two sides and front edge Cylindrical Alundum Tool: Polish the surface or thin the front edge of the acrylic nail, it¡¯s also suitable for natural nails. Conical Alundum Tool: Polish the back edge of the acrylic nail to get a smooth surface at the joint with the natural nail. Carborundum Tool: Grind the acrylic nail for the two sides and back edge. Wool Tool: Using natural wool material to polish the nail surface and get a shining art. 3.Push the switch to ON position and the unit starts working. 4. Push the switch to OFF position after use. Remove the attachment from main body, and put the attachments into the storage box. 5.Clean the attachments with a brush or tissue after use. 6.If there is dirt on the main body, please clean it with wet cloth or tissue. Do not wash it with water. .7.Remove batteries if the product will not be used for an extended period. 8.Keep out of reach of children. 9.DO NOT disassemble the main body if not being professional.