The Smile Direct Club Bright On Teeth Whitening Kit 500214 is an organic and enamel-safe teeth whitening kit designed for people with sensitive gums. It features activated charcoal, hydrogen peroxide, and sodium hydroxide as active ingredients, along with an LED screen, timer, and adjustable settings for personalized use. With a mint flavor and a regular size packaging, this teeth whitening kit from Smile Direct Club is convenient for on-the-go use and provides a brighter smile in just 24 months.