Before purchase: Give the most professional guide for choosing the right products or service system. After purchase: Warranty for 1 or 2 years as the application and your requirements. Any damage will be repair or replace new during warranty as long as use the products as the right way and normal wear of the products apart from any break by personal reasons. After-sale: Always give the most professional suggestions for the products working status, give support for customers marketing developments of own brand business. Always repair as long as we keep cooperation.