Feature: 1. Helps remove tea stains, coffee stains, tooth pigments, and plaque. 2. Supports teeth whitening, helps reduce tooth discoloration, enhances oral hygiene, and promotes oral health. 3. Portable for convenient use anytime, anywhere. 4. Designed to deliver faster visible whitening results. 5. Simple and easy to use. Instructions: 1. Brush and floss your teeth. 2. Dry the teeth with a paper towel. 3. Rotate the bottom of the pen clockwise (to the right) until a small amount of gel flows from the gel cavity onto the brush. You may need more twists for the first use. 4. Keep your lips away from the teeth. 5. Use a uniform brush stroke to apply a thin layer of gel on each tooth. Avoid contact with gums. 6. Relax your lips after 30 seconds. 7. Avoid eating or drinking within 30 minutes after application. 8. Use twice daily until desired results are achieved. 9. Always close the lid to prevent the serum from drying out. 10. Store in a cool place, preferably refrigerated. Specifications: Applicable object: Adult Function: Teeth whitening Net content: 3ml - 3g - 0.1oz Efficacy: Teeth whitening Package Included: 1 x Whitening Brush Notes: Due to differences in monitor displays, the images may not reflect the actual color of the item. Please compare the detailed dimensions with your own measurements. Allow 1-3cm variation due to manual measurement. Please leave a message before providing negative feedback if there are any issues with the product. Thank you for your understanding.