describe: who the GPIO for must have had such an experience. There are many modules, but the modules interfere with each other, so we need to a breadboard to combine . In some cases, the modules are buckled into the GPIO. The direction is always a fixed direction, such as a small OLED screen, how do I want it to stand up?In other cases, I finally made a DIY case for , and found the height after inserting the cable was too high, and it was inconvenient to replace the cable after the case was buckled, and I had to open . I feel tired and 't like it anymore, now you 't have to worry, with this GPIO edge expansion board, all of your problems can be solved easily.Colour: BlackFeatures:1. Easy to plug and play2. Horizontal pin headers are convenient for side access3. Vertical pin headers are convenient for front access4. Equivalent to multiplexing GPIO expansion boardSpecification;Product name: GPIO edge expansion boardMaterial: PCB+MetalPin: 40PinApplicable products: for 4B/3B+/3B/2B /Package Contents:1 x GPIO edge expansion boardOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.