1、ESP32 Expansion Board: This ESP32 breakout board GP10 1 into 2 is a 38PIN narrow ESP32 for ESP wR0M 32 microcontroller development board. 2、GPIO 1 into 2: This breakout board expands 1 GPIO pin of the esp32 development board into 2, allowing users to reuse all pins in smart home projects. 3、2 Types Connections: Pin header and screw terminal. Just choose them according to your purpose. No need to solder your own parts, very easy to use. 4、Double Layer PCB: The expansion board is a double layer board with a pin on both sides. Therefore, the circuit is stable and reliable, and there will be no poor circuit contact and unstable signal transmission. 5、Important Note: Only compatible with the 38 pin narrow and no mounting hole versions of the esp32 development board, not applicable to other versions.