Features: Features double-styles prototyping area with breadboards and perfboard sections, enabling easy integration of DIP chip and sensors. Breaks out all GPIO, I2C, SPI, and power pin to 0.1in strips and 2.5mm screw-terminals block for easy connectivities. Includes SOIC surfaces mount chip breakoutsArea, catering to chip not available in DIP format. Specifically for Pi2/3/4 B B+, this prototype expansion board is compatible for various models, making it ideal for seamlessly prototyping and development. Perfect for students, educators, hobbyists, engineers, and maker, this board supports STEM education, DIY projects, rapid prototyping, and innovative product design. Specifications: Component:Plastic Size:Approx.89x57mm/3.5x2.24inch Interfaces:GPIO, I2C, SPI for Pi2/3/4 B B+ Package Includes: 1pc Prototyping Extension Board note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.