Features: Easy Remove Years of Stains: It removes the stains caused by smoking and drinking tea or coffee more effectively ,whitens yellow teeth completely and sweeps away plaque to restore the teeth healthy and white. Application: Applicable to all kinds of exogenous turbidity such as smoke stains,tea stains, coffee, cola, red wine, colored food, bad habits and other reasons caused by yellow teeth. Portable: The compact design makes it very easy to whiten your teeth on the go, at any time and any place. This whitening teeth pen is portable and can even be used while traveling. Professional Quality: Our whitening pen can provide an excellent solution for high-quality whitening without any sensitivity. How to Use: 1. Cleaning your teeth 2. Remove cap and gently twist dial from bottom until serum reaches on brush. 3. Apply a layer of the whitening serum to each tooth surface, then keep mouth closed for 20 minutes. 4. For best results, repeat twice daily for 7 days, then use as needed for weekly touch-up. Specifications: Net Content: 3g/pc Shelf Life: 3 years Notes: 1. Due to the effects of light and shooting angle, the actual color of the item may differ slightly from the color shown on the picture. 2. Due to manual measurement,please allow 1-3cm measuring deviation.Thank you for understanding! Include: 1 * Teeth Whitening Pen OR 2 * Teeth Whitening Pens