Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Color: Green _x005f_x000D_ Material: PCB _x005f_x000D_ Applicable interface type: Standard 38Pin interface _x005f_x000D_ Compatibility: Only compatible with 38 pin narrow hole and non mounting hole versions of the esp32 development board, not applicable to other versions _x005f_x000D_ External dimensions: About 78x66mm/3.07x2.59inch _x005f_x000D_ Weight: 30g _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Expansion Board 1. Versatility: The ESP32 expansion board breakout board GPIO 1 INTO 2 is a safe and reliable module that can be extended to various applications. This module has 38 pins, which provides more functionality than the 30-pin module. Moreover, it is compatible with the circuit board, and its width is narrower than other modules. 2. Easy to Use: The module supports Lua programming, making it easy to develop. It supports three modes: AP, STA, and AP + STA. 3. Compatibility: The module is suitable for 38P IN narrow type ESP32 ESP32 ESP- WROOM 32 microcontroller development boards. It is only compatible with the 38-pin narrow-hole and no installation hole version of the ESP32 development board and not for other versions. 4. GPIO 1 INTO 2: This breakout board extends one GPIO pin of the ESP32 development board into two, allowing users to reuse all pins in smart home projects. It is an excellent alternative to traditional breakout boards.