The Smile Sciences teeth whitening kit provides consumers the opportunity to perform teeth whitening treatments on themselves from the comfort of their own home. The kit includes upper and lower trays that you can custom fit to your mouth, one 5 mL syringe of our FDA registered and dentist approved gel, two vitamin E sticks to clean up any excess gel left on the gums, an LED light to activate the whitening gel for faster results, and a whitening pen that maintains the results achieved giving you an additional 14 day supply. You will see results in as little as 20 minutes that can leave your teeth up to 10 shades whiter. This kit has 20 treatments.