To use the Déesse Pro EOS X LED Phototherapy Mask, first make sure your face is clean. Put on the mask and turn it on. You can use it for about 10 - 15 minutes a day. Don't look directly at the light during use. After using, clean the mask with a soft, damp cloth. Store it in a cool, dry place. If you have sensitive skin, it's a good idea to test it on a small area first. And always follow the manufacturer's instructions.