SPECIFICATIONS

Regarding the materials：
1. All products sold in our store are various core boards, targeted at customers with certain development capabilities. There are no other introductory materials provided. The content of the materials mainly includes design drawings and test codes (the content of the complimentary materials is described below on the webpage).
2. Customers who need to select a model should refer to the product information introduction below the webpage. The materials will be downloaded through a Baidu Cloud Disk link or shared via email after shipment.
3. If you do not receive the data link after a long period of time after placing the order, please proactively contact customer service.

After-sales service：
1. Each development board undergoes testing before shipment, and in principle, there should be no quality issues.
2. Please ensure that the goods are intact before receiving them. To protect our rights and interests, all products will be photographed and saved before shipment.
3. Products sold are not eligible for return.