Rapid Whitening Results:2-8 shades in 7 days! Smilestra teeth whitening kit system is all about boosting your confident smile, and to deliver long-lasting appearance-altering results in as little as 7 days. Eliminate stains from long term yellowing and beverage stain buildup. PRODUCT FEATURES: Easy to Use (Instructions Included) Convenient, Safe & Effective No Mess, No Drip, No Strips Long-Lasting Results 100% Medical-Grade Silicone Smilestra utilizes an innovative LED teeth whitening light mouthpiece connected via USB to your smartphone or other power source. Apply a thin layer of 35% carbamide peroxide whitening gel to each tooth, then insert the mouthpiece. A timer will automatically switch the unit off after 16 minutes. Repeat daily and as needed to achieve your desired results. Whitens anywhere, anytime plugs into IPHONE, ANDROID, USB, TYPE C Connect to any smartphone or tablet device and power Smilestra anywhere you go. MADE IN USA!! QUALITY YOU CAN TRUST! Smilestra is proudly designed and Made in the USA in a state-of-the-art facility using medical-grade materials and sustainable, ethical, cruelty-free manufacturing practices. Nothing beats a great smile… Reveal your greatest smile ever with Smilestra.