Features:Multifunctional: Whether you are dealing with stubborn stains, yellowing, or just want a brighter boost, a quick daily application helps you smile with confidences.Powerful: The advanced formulas breaks down years of built-up stains at the enamel level while being gentle enough for sensitive teeth.Extra Strength Cold Serum Formulas targets deep stains from coffee, wine, and moreNo Sensitivity, Just Brightness: Our gentle formulas is designed to be effective without causing tooth or gum sensitivity safe for daily use.Portable & Easy to Use: Compact pen design fits easily into your bag or pocket. Apply anytime, anywhereNotice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurement Description:Net content: 2mlSize: 1.3x12.7cmPackage List:1x 2ml Teeth Brightening Cold Serum Pen