Contains Urea Peroxide to safely & effectively remove intrinsic stains from beneath the surface of tooth enamel   Works well with Professional Whitening Toothpaste for safe & superior whitening  Does not cause sensitivity  Reveals white & clean teeth    To use: On a dry toothbrush, place a pearl size drop of Whitening Toothpaste & Whitening Accelerator. Brush in a circular motion for 2 minutes. Rinse with water  The quality of this unboxed item is as fresh & genuine as the original packing 