The Advanced Teeth Whitening System gives you a brighter, whiter smile in an easy three-step process. Simply dab the included pre-whitener onto your teeth and place the revolutionary 7-LED blue light whitening device into the mouth for 8 minutes. Then repeat the process twice more with the peroxide whitener and enamel booster gels. The LEDs react with the gels to make teeth whiter while you relax or watch TV. Includes enough gel for 5 to 8 treatments.