1、The pins of for Raspberry Pi have been expanded, suitable for RaspberryPi 400 interface 2、At the top of the terminal, there is the information of the GPIO pin, which is convenient for you to view and operate 3、Made of good‑quality PCB material, which is durable with long life and stable structure 4、This product can be used for interface transfer module, interface extension 5、This is a double row expansion board, which possess larger area and higher efficiency 1 x Expansion Board4 x Brass Pillar1 x Screw Pack Item Type: Expansion Board Material: PCBPurpose: Interface transfer module, interface extensionSpecification: Double rowSize: Approx. 40.2mm / 1.6in 56.2mm / 2.2in 51.2mm / 2in 33.3mm / 1.3in 24.8mm / 1in