COMPATIBILITY: Designed for 38PIN narrow version ESP32 without mounting holes. Not compatible with other versions. GPIO 1 TO 2: This breakout board expands one GPIO pin on the ESP32 development board to two, enabling full pin utilization in smart home projects. Ideal for breadboard-free setups. TWO CONNECTION TYPES: Equipped with both pin headers and screw terminals. Choose the connection type based on your needs. DOUBLE-LAYER PCB: Constructed with a double-layer printed circuit board. Each pin is connected on both sides, ensuring stable circuit performance and reliable signal transmission. UPDATED DESIGN: Fully pre-soldered boardno additional soldering required. Ready to use right out of the package. Material: Plastic Color: Green Package Contents: 2 x ESP32 Breakout Board Note: Other items not included. Note: Lighting and display differences may cause slight color variations between the image and actual product. Measurement tolerance: +/- 1-3 cm.