Warm reminder: 1.Please be careful not to use this product while exercising, smoking, eating or drinking hot beverages. 2.Do not wear it for more than eight hours at a time. 3.Take it off when you sleep or feel unwell. 4.Whether it's a date, a job interview or a party,you can use it to help you regain confidence and increase your charm. 5.If you have questions about the use of this product, you can watch a video to help you use it.