This 24% and 30% hydrogen peroxide in-office starter kit offers everything an office needs to provide whitening treatments. Features the compact Tech Kit with a mouthpiece, a step-by-step guide, and Post-Whitening Enamel Serum. Gel is formulated with potassium nitrate to prevent sensitivity, a key feature. Patented closed-mouth system accelerates results, prevents dehydration, and delivers professional whitening in as little as 16 minutes without rebounding. Serum effectively covers imperfections as it fortifies enamel against sensitivity, erosion, and future stains. Contains ingredients to help prevent sensitivity. No impressions or refrigeration are needed. All products are gluten- and cruelty-free.