Q: Are you trading company or manufacturer ? A: We are factory.
Q: How long is your delivery time? A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ? A: No,it's large and not free.
Q: Do you assign engineer for after-sale service? A: Yes. For our products,we all show after-sale guide installation adn question inquiry