Spraywhite 90 Teeth Whitener Kit is a clinically proven spray technology that whitens teeth several shades with one 90-second application. 90 seconds is all it takes to whiten your teeth as much as five shades! Any sensitivity you may experience is quickly knocked out with WOW Powder Oral Rinse, a patented oral rinse that significantly reduces gum irritation and tooth sensitivity associated with other whitening methods. · Simple and convenient to use · Whitens, removes bio-film, and kills bacteria · Faster and more efficient · No messy strips or trays · No sensitivity (when used as directed) · Helps maintain healthy gums · Freshens breath and cleans mouth