Thank you for using the products produced by our company: this manual contains important information such as product use, installation and maintenance methods. Please read it carefully and install and operate it as required. At the same time, please keep this manual properly in case of emergency. When this product leaves the factory, its performance is intact and its packaging is complete. All users shall strictly abide by the warnings and operating instructions stated in this manual. Any damage caused by misuse is not covered by our company's guarantee. This manual is subject to technical changes without prior notice.