Specification: Origin: Mainland China Color: Black Green Style: A: 1 x Expansion board B: 1 x Expansion board + 1 x Development board Material: PCB Option: Expansion board, development board with CP2102 chip MICRO USB interface (optional) Compatibility: The distribution board is only suitable for 38PIN narrow version ESP32 without installation holes. Tips: Not suitable for ESP-WROOM-32 DevKit V1 version. Please confirm that the pin width of your ESP32 board is consistent with the pin width. Splitting board Important tips: ESP32 Breakout Board GPIO 1 into 2 can only be compatible with 38 Pins ESP32, which is for reference only: NodeMCU-32S Lua 38Pin Size: About 66.2x78.2mm/2.61x3.07inch Weight: 30g Note: 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! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Expansion board Or 1 x Expansion board 1 x Development board 1. Comprehensive Integration: This ESP32 expansion board integrates an antenna switch, RF balun, power amplifier, LNA, filters, and power management module, all on a compact PCB, providing a comprehensive solution. 2. Dual-mode Wi-Fi & Bluetooth-compatible: The expansion board incorporates a 2.4GHz Wi-Fi and Bluetooth-compatible dual-mode chip that uses TSMC's low-power 40nm technology, delivering optimal performance and reliable RF operation. 3. Stable and Reliable Design: With a double-layer design and a single-pin connection on both sides, this expansion board ensures stable and high-reliability operation while providing excellent contact and signal transmission to your ESP32 board. 4. GPIO Expansion Board: The splitter board expands one GPIO pin of the ESP32 development board into two, making it an excellent tool for projects requiring repeated use of all pins. It is also an alternative option for those looking for a similar product.