Quality assurance：
Ensure that all sold goods are brand new products that comply with the contract and pass the factory inspection. During the warranty period, any malfunctions that occur due to normal use according to the product manual will be repaired free of charge by our company.
Technical support：
All devices sold are equipped with installation and debugging services, and on-site technical training is provided to users until they are proficient in operating them. Users can consult our after-sales personnel about technical issues and usage methods at any time during the use of the device. Based on the specific situation, our company will arrange on-site training or remote guidance.
After-sale service：
1. Can install and debug products on behalf of users
2. Provide technical guidance on usage and other aspects based on user needs
3. Ensure the supply of maintenance spare parts
4. Responsible for maintenance services and product upkeep
5. Provide regular phone or home visits for users