Describe: Teeth Whitening Pen Specifications: 1 Features Alcohol-free, gently removes stains, removes superficial and deep pigmentation of teeth, brightens teeth for whiter and brighter results. Applies to: 1. Yellowing, blackening, graying of teeth caused by smoking, drinking tea, coffee or other foods. 2. Age-related yellow teeth, black teeth, gray teeth, mild to moderate tetracycline teeth, etc. 3. People who want whiter and more beautiful teeth. how to use: Step 1. Clean and dry the tooth surface. Step 2. Pull out the top cover and turn the bottom clockwise until the liquid seeps out. Step 3: Apply the whitening gel evenly on the surface of the teeth, with a thickness of about 1 mm (the general whitening range is 8-10 teeth above and below). Step 4. Don't eat for 20 minutes, and wash your teeth with clean water after 20 minutes. Precaution: 1. This product is made of dental external materials. Do not take orally. 2. Please keep this product out of reach of children to avoid accidental ingestion. 3. Children under the age of 8, pregnant women and special groups are prohibited from using. Comment: 1. Manual measurement tolerance is 2-5g. Please don't mind your substitutions. 2. Due to the difference between different monitors, the image may not reflect the actual color of the item. thank you very much! 3. SKU color is the color of product packaging Package Included: 1 tooth whitening pen