We are factory.
Generally it is 3-5 days if the goods are in stock. or it is 5-10 days if the goods are not in stock, it is according to quantity
Payment<=5000USD, 100% in advance. Payment>=10000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us
Yes, We have our own R&D team.
