Features: 100% Brand new . After use the phase I Corretor for 2-3 months,please keep tring with Phase II to enhance. It must be worn for 1-2 hours each day and overnight while slepping and always remember to follow these few simple steps: (1).Lips together-at all times except when speaking. (2).Breathe through the nose-to assist the development of the upper and lower jaws,and to achieve the correct bite. (3).No lip activity when swallowing - which allows the front teeth to develop correctly. Cleaning the corrector: Please clean it every time when remove it from your mouth with normal water. Please do not use hot water to clean it,it will damage the shape. How to Use: Step1: Hold the Trainer with Tongue Tag up. Step2: Place the Trainer into the mouth. .