The Pur-Well Living Pur White Smart Teeth Whitening System uses Smart LED technology to minimize irritation and maximize whiteness at a fraction of the price of popular brands. For those looking for a professional, yet affordable, at-home whitening system to achieve a beautiful, confident smile. The White Smart Advanced Teeth Whitening System is a revolutionary whitening system that uses LED light technology and whitening gel to help produce visibly whiter teeth. Included in the kit are the Pur White Advanced On-the-Go Whitening Pen, Cheek Retractor, and Remineralizing Gel (for sensitive teeth). The Whitening Pen helps you get to those hard-to-reach spots as you brush. Pur White Smart Advanced Teeth Whitening System's specialized Pur-Bright LED technology covers both visible and non-visible teeth for advanced whitening.