8. To use the whitening pen effectively, users should shake it well for 5 seconds and twist the base several times until the gel covers the brush tip. A thin layer of the gel should then be applied to the teeth, avoiding contact with gums or lips, ensuring a precise application. 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. 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. 4. The active oxygen bubbles in the whitening gel work instantly to remove stubborn tooth stains. This formula is pH neutral, making it easy to apply without causing harm to the enamel. Additionally, the gel dries quickly, ensuring that it does not rub off and remains effective during the whitening process. 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.