How to Use: 1. Plug the product's power cord into the power socket, and the power indicator is on. 2. Insert the C3.5 plug of the DC power cord into the socket of the back cover of the grinding machine. 3. Select the appropriate grinding head according to the operation requirements, and then insert it into the hole of the handle. 4. Rotating speed and forward and reverse rotation can be adjusted by rolling wheel. Specification: Item Type: Electric Nail Drill Machine Material: Aluminum alloy Power Supply: USB charging Product Speed: 15000rpm Advantages: Compact and beautiful, the size is more fit for female hand. Uses: Household, nail shop, etc. Package List: 1 x Nail Drill Pen 6 x Polishing Heads 6 x Sand Bands 1 x USB Cable