Summary Crest 3DWhitestrips Professional White + LED Accelerator Light is designed to whiten like a professional-level teeth whitening treatment at home. Details Benefits 30 Levels Whiter in just 19 Days Whitens 50% better than 3DWhitestrips alone in just 3 Days #1 Dentist recommended at-home teeth whitening brand Features Uses the same whitening ingredient as dentists Advanced Seal Technology no-slip grip so strips stay put during full application time Enamel Safe & Effective Includes Led Light 3D Whitestrips (19 treatments each with 1 upper and 1 lower) How To Use Peel the upper and lower strip from plastic backing liner and apply strips to upper and lower teeth. WEAR FOR 1 HOUR. DO NOT REMOVE THE TOOTH WHITENING STRIPS YET. To start the light treatment, press and hold the two buttons on the sides of the device simultaneously to turn on light, then release. Place the light against strips for 5 minutes. Light will turn o after 5 minutes. Then remove the light and strips. Peel strips from back of teeth first to ease removal. Reveal your whiter smile.