This GPIO header kit includes four types of 20x2 pin GPIO headers, compatible with various circuit boards featuring GPIO interfaces. The expansion board allows one GPIO pin to be expanded to two. It features a 2 x 20-pin double row connector that increases pin height for easier connection between the expansion board and other components. It also includes a 2 x 20-pin bent row pin header, with the GPIO direction perpendicular to the board, facilitating connections with other devices. First, solder the pins to the PCB, then insert directly into the target board. Specification: Name: GPIO Header Kit Color: Black Material: ABS + Metal Package Contents: 12 x GPIO Header Only the above package content is included; other products are not included. Note: Lighting and different displays may cause slight variations in the color of the item in the picture compared to the actual product. Measurement may vary by +/- 1-3 cm.