Wide Compatibility: The breakout board is only fit for 38PIN narrow version ESP32 without mounting holes.Notice:Don't fit with the ESP-WROOM-32 DevKit V1 version.Please confirm your esp32 board pins width is coincide with the pin width of the breakout board 30Pins ref asin: B08D5ZD528; 38pins ref asin: B09DPH1KXF and B09DPGMZR9 . IMPORTANT: ESP32 Breakout Board GPIO 1 into 2 only can Compatible with 38 Pins ESP32S ESP32 ,that is to say just for ref asin: B09DPH1KXF and B09DPGMZR9 This module is safe, reliable, and scalable to a variety of applications. The expansion board is design with double-layer that One pin is wired on both sides. Stable and highly reliable.Great contact and stable signal transmission for your esp32 board AITRIP breakout board can expand one GPIO pin of ESP32 development board to two, which is very nice for you to reuse all pins , it is a good tool for your smart home projects. Nice breadboard alternative :The ESP32 Breakout Board can expand one GPIO pin of esp32 development board to two.Perfect for users to reuse all pins in smart home DIY projects.Excellent breakout board 2.4GHz Dual Mode WiFi + Bluetooth Development Board Ultra-Low power consumption, works perfectly with the Arduino IDE Support LWIP protocol, Freertos SupportThree Modes: AP, STA, and AP+STA ESP32 is a safe, reliable, and scalable to a variety of applications