Respected customers:Hello, thank you for your support. Because of the low price, our products are also free of charge. Free mailing may cause the goods to be received too late. It may also be due to the loss of express delivery during free transportation. So please choose other express delivery according to the time you need. Thank you for your cooperation. If you choose express delivery free of charge, there are records on the Internet, but there are still missing items due to late receipt. All explanations are in our shop. Thank you for your cooperation. Please make reasonable xuan'z.= Abo ut us objective =We are the market leader of online electronic distributors and BOM solutions.If you buy more quantity, please contact us and I will offer you a preferential price.If you can't find the products you need, please contact us. We will give you quotation. We provide one-stop purchasing service.Our company mainly deals in resistors, capacitors, transistors, memory chips, communication chips, high frequency radio frequency and other high-end products. Our aim is to provide raw materials and honest service. Founded in Beihua Qiang for 10 years, the company has a strong sales agent for system manufacturers on the Internet.= = payment1. Make sure your payment account is available before payment.2. All payments shall be settled within 7 days of receipt of the goods. If you really can't pay, please contact us first, we will help you solve the problem.3. If you have any special requirements for the details of the project, please leave a message in the order.= delivery =1. We can ship our products all over the world.2. AliExpress Care-free Logistics - Standards, DHL, FedEx, TNT, UPS, EMS, China Post and Hong Kong Post are available. Friends in Brazil. Due to the high customs conditions of DHL, FedEx, TNT and UPS in Brazilian Customs, it is difficult to clear customs. Sellers can choose EMS. EMS logistics is easier to pass customs in Brazil.3. Upon receipt of payment, the project will be sent within 3 days.4. When making payment, please ensure that your delivery address and contact number are correct.5. You can track the status of products on the website after shipment.= feedback =1. As your opinions are very important to our development, if you are satisfied with our products and services, we sincerely invite you to leave us good feedback. Thank you very much for your valuable time.Our plan will leave the same feedback after your positive feedback.3. Before leaving any negative feedback or opening any controversy on the website, please contact us and we will try our best to solve the problem.Thank you very much for your support. Have a nice day!