Now, whitening your teeth is easy! Remove 10 years of stains in just 3 days with the Colgate Optic White ComfortFit LED Teeth Whitening Kit! Fueled by indigo wavelength technology, the LED device amplifies the hydrogen peroxide serum for exceptional whitening results. The enamel safe serum is designed for no tooth sensitivity and the lightweight, flexible LED device molds to your mouth for uniform whitening, so you don’t have to sacrifice comfort when it comes to whitening your teeth!