Product title:Teeth Whitening Serum Oral Hygiene Whitening Gel Removes Plaque Stains Cleaning Bleaching Tooth Whitening Serum Dental Tools. Teeth whitening Essence Oral Hygiene Cleaning Essence Removes Plaque Stains Brighten Tooth Whitener Serum Dental Tool Toothpaste Usage for Teeth Whitening Serum: 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. 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. 6.Storage:After use please tighten the cover store it in a cool and dry place so as to avoid direct sunlight. Package Included: send as your order Due to different measurement methods, please allow a measurement error of 2-3cm. Due to the problem of shooting tools and light, please allow the color difference between the picture and the product.