Features: GPIO expansion: Provide additional GPIO interfaces GPIO to expand its functions and applications. terminals design: Through terminals interfaces, it is convenient for users to connect external devices for more projects. Easy Installation: GPIO, easily no soldering required for optional, suitable for professional and starter Wide Expansion: Provides additional GPIO interfaces and terminals to connect. Highly Stability: highly quality materials with highly stability to ensures data transmission. Specifications: Item: GPIO Expansion Board Size: as Pictures Package: Welded or Unwelded Note: Due to lighting effect and shooting, there is color difference in product, please understand. Due to manual measurement, there is a tolerance in product Package includes: 1Set GPIO Expansion Board