This is the GPIO header kit, including 4 types of 20x2 pin GPIO headers. It can be used for Raspberry Pi or other circuit boards with GPIO. This expansion board can expand one GPIO pin into two. With a 2 * 20-pin double-row connector, which increases the pin height to facilitate the connection between the expansion board and Raspberry Pi. With a 2 * 20-pin curved row pin header, the GPIO direction is perpendicular to Raspberry Pi, which is convenient for the connection between Raspberry Pi and other devices. First solder the pins on the circuit board and then insert it directly into Raspberry Pi. Specification: Name: GPIO header kit for Raspberry Pi Color: black Material: ABS+metal Package Contents: 12*GPIO header Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.