Q1What service can you supply? We have our brands products and OEM/ODM service. Q2:Can I test the sample? A:Yes, we can provide samples for testing for a fee.The cost of the sample will be refunded when the next batch of customer mass production orders, but shipping costs are not included. Q3:How do you ensure quality? A:The company designs and develops the system and circuit board according to the requirements of customers for CE, using high quality materials to ensure the good performance of the system, and carries out quality control tests for many times before delivery, so that the products can meet the requirements of automobile dealers and are durable. Q4:Are you a trading company or a manufacturing company? A:We are the manufacturers. Q5:Do you test all your goods before delivery? A: Yes, we have 100% test before delivery.