Warm Tips:1. All our products are tested and inspected by the quality control department before shipment.2. We provide strict bubble protection for each product to ensure that the goods you receive are intact. You can buy with confidence.3. After receiving the purchased products, please check the integrity of the items and test them. If there is any damage to the package, please take photos or videos and contact us at the first time.Precautions before installation:1. Please test before installation, and if you encounter any problems, please contact us first.2. If you are trying to install for the first time or are a non-professional, we recommend that you ask professional technicians to help you install.After-sales service:1. We are not responsible for damage caused during installation or mistakes made by installers.2. If you encounter any problems with our products, please contact us in time. There are professionals who will provide you with solutions. At the same time, we also hope that you can understand that bad reviews cannot solve the problem, and we need your cooperation and trust to better serve you.