Our nail care phototherapy device contains LED light beads, USB interface, and plastic casing. It can use specific wavelengths of blue light to penetrate the surface of nails, producing photodynamic reactions on keratin in the nails and helping to eliminate microorganisms around the nails. Its usage is very simple: 1 Clean and dry hands and nails; 2. Use nail clippers to cut off excess nails. 3. Turn on the switch to activate the device and place your nails in the light for about 7 minutes; Using it daily can achieve better results. Do not let electrical appliances work for long periods of time to avoid overheating. If any abnormalities are found, they should be repaired or replaced in a timely manner.