1. Quality assurance service All our products are guaranteed for 1 year, we will do a full inspection of all products If you have any questions, please contact us as soon as possible, we will take full responsibility. If you need your cooperation, please communicate in time to ensure that after-sales problems are solved for you as soon as possible The S-series and most of the lower priced ones have quality issues and just need videos and photos. Upon confirmation by the engineer's judgment, we will send you additional brand new items in your next order 2. How long is the delivery time? We will ship in-stock products within 3-7 business days, bulk items take 8-25 business days. We will have dedicated staff to track your order. Ensure that it can be delivered to you in the fastest time 3. What services can I get (1) We are equipped with professionals to serve you one-on-one to ensure the perfect delivery of the order (2) Ensure that the materials used in the product are of the highest quality and brand new (3) For any operation and installation problems, we have professional engineers to give you the most professional guidance (4) Ensure that any after-sales service can get a perfect solution (5) After we become a partner, we can provide pictures, videos, packaging design, logo modification, market research reports and hot-selling product recommendations, etc. 4. Why some products have low prices Rest assured, the materials we use guarantee a brand new high quality, mainly because the configuration of the product itself has been reduced, and some functions that are not commonly used have also been deleted. cut costs 5. About other categories of products We are building a one-stop service procurement platform for early morning. Besides our own 2 powerful factories and cooperation with many quality factories. Provide you with all automotive electronics and car modification products. And provide you with Alibaba ebay AliExpress lazada shopee and other popular categories on other platforms. Let you order products to sell quickly