Enhance your projects with our versatile GPIO Expansion Board, specifically designed for 5B 4B, 3B, and 2B models. This compact expansion board features a 40-pin lead-out, facilitating easy and secure connections. The screw terminal block is more convenient and firm to connect, and it is not easy to loosen, which is more advantageous for DIY circuits. this expansion board is perfect for applications, ensuring reliable and efficient project executions. Hign-concerned Chemical:None Compatible With:For 5/4/3B Accessory Type:Extension Board Installation hole distance: 58MM Colour: As Shown Material:Plastic style:A Standard Edition Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Package Contents: 1 * GPIO Terminal Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.