Smile Direct Club bright on Premium Teeth Whitening Kit - LED Accelerator Light and 4 Whitening Pens

4 pens for 6 months of whitening 1 full week treatment Results last up to 6 months Up to 9 shades whiter in just one week Same enamel-safe whitening agent used by dentists Whitens with low to no sensitivity. Helps remove years of tough stains Both iPhone and Android users require mating with the chipset provided in the case. It is recommended that the phone remains on while in use.