1. Refers to usmile's first electric toothbrush for kids with a patented ergonomic design.2. The DuPont Tynex 5901HA brush filament used in this product contains sodium fluoride, which has the effect of preventing tooth decay. Brush filament report: NaF Statement. Reference: Lian Chenyue, The chemical principle of sodium fluoride in the prevention and treatment of tooth decay and its miniature simulation experiment [A], 2017.3. Motor Patent: China Utility Model Patent, Patent Number: ZL202022654965.5.4. Data was obtained from the usmile testing center.* usmile Sonic Electric Toothbrush Y1S is certified by the American Dental Association (ADA).** Refers to the total number of all usmile products-related awards.*** Refers to the total number of authorized patents from the usmile brand company - Guangzhou Stars Pulse Co., Ltd. Statistics as of March 14, 2023. The above 450 + patents have obtained patent certificates, including but not limited to: Electric Toothbrush: Chinese Invention Patent, Patent No. ZL202010625423.8; Chinese Utility Model Patent No. ZL202022578328.5: Chinese Utility Model Patent No. ZL201920492944.3: Chinese Utility Model Patent No. ZL2019203777706: Chinese Utility Model Patent, Patent No. ZL202020693145.5376 Water Flosser: Chinese Utility Model Patent, Patent No. ZL202122406730.X; Chinese Utility Model Patent No. ZL202121910195.5: Chinese Utility Model Patent, Patent No. ZL202121909816.8; Chinese Utility Model Patent, Patent No. ZL202121909754.0; Chinese Utility Model Patent......China utility model patent, patent number: ZL202123203607.4; patent number: ZL 2021 2 3195656.8