10. The package includes multiple pens, available in sets of 2, 3 or 1, providing users with an extensive supply for their bleaching needs. It is important to note that due to display and lighting differences, the actual product may differ slightly from what it shows, and users should allow minor measurement errors. 9. After applying the gel, users should keep their smile for 30 seconds to allow the whitening gel to dry on the teeth. It is recommended to rinse the mouth after half an hour and to avoid eating or drinking for at least one hour post-application to maximize the whitening effect. 2. One of the standout features of this teeth whitening pen is its no sensitivity formula. Unlike many other whitening products, this pen is crafted to ensure that users do not experience any discomfort or sensitivity during or after application, making it suitable for individuals with sensitive teeth and gums. 3. The precision targeting capability of the whitening pen is enhanced by its fine tip brush. This allows for effective application of the gel to specific areas of the teeth, ensuring that every visible part of the smile is treated and whitened, leading to a more uniform and bright appearance. 5. Compact and portable, this whitening pen is perfect for on-the-go use. Its travel-friendly design allows users to maintain their whitening routine wherever they are, ensuring that they never miss a treatment, whether at home, in the office, or while traveling.