Check the listing for details. 2pcs ESP32 breakout board shield GPIO for 30PIN ESP32 development board. Condition: New. Listed at 18.48 USD. IMPORTANT: Only compatible with 30 pins ESP32 development board, ref asin: B0B9G74NNM. Not applicable to other versions. GPIO 1 INTO 2: This breakout board can expand one GPIO pin of esp32 development board to two, which is convenient for users to reuse all pins in smart home projects. Nice breadboard alternative. 2 TYPE CONNECTIONS: Pin Header & Screw Terminal. Just select them according to your purpose. DOUBLE-LAYER PCB: The expansion board is a double-layer board. One pin is wired on both sides. Therefore, the circuit is stable and highly reliable, and there will be no poor circuit contact and unstable signal transmission. UPDATED VERSION: Compared with the previous version, the board of this version has been soldered completely. No need to solder parts by yourself, which is very convenient to use.