1、The extended IO port can be directly inserted into the female head through the bread line, which is easy to use and can realize your ideas quickly and easily. 2、The IO port has terminal output. When connecting an external module, you can tighten the ordinary wires on the terminals. 3、Custom female connectors and silicone pads will help support the prototype protective cover of the for Raspberry Pi. 4、The product is suitable for Raspberry Pi 4B/3B+/3B/2B. 5、The board is featured with stable performance and long service life. 1 x Multifunctional Expansion Board1 x Pin Header1 x Patch Item Type: Multifunctional expansion boardHole Distance: Approx. 2.54mm / 0.1inNumber of Male Header Pins: 40Male Header Pin Pitch: Approx. 2.54mm / 0.1inUse: Suitable for Raspberry Pi 4B/3B+/3B/2B.Size: Approx. 89 x 56mm / 3.5 x 2.2in