* Usage for Teeth Whitening Essence: Before use, please clean the mouth with warm water, then use a cotton swab to dip proper amount of the product, wipe the teeth surface evenly and rinse it with clean water after 15-20 minutes, we recomend to use 2-3 times per week. * How To Use Teeth Whitening Pen: *After cleaning the teeth, remove the cap and rotate the end of the whitening pen until the essence overflows onto brush head. Then apply the product on the teeth evenly and rinse it with clean water after 15-20 minutes, we recomend to use 2-3 times per week. Tips: 1. When removing the stains, please wipe gently so as not to damage the gums and oral mucosa; 2. Properly wet the cotton swab when it is soaked, making sure it is not too wet; 3. It takes about 1 min to wipe each tooth; 4. If the stains can't be removed completely, please use again after a week; 5. Children under the age of 13 should not use it. Do not try to swallow. Storage:After use, please tighten the cover, store it in a cool and dry place, so as to avoid direct sunlight. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store