A.1: If users encounter any problems during use, they can consult the service hotline at any time to ensure that your problems are solved promptly and smoothly; "One-stop" service: The company uses multiple methods (telephone, WhatsApp, email) to effectively Answer customer questions and provide technical support at any time.

A.2: When assisting in solving technical problems that may be encountered, users please tell us the product model, working conditions, and wiring methods so that we can solve the problem for you quickly and accurately.