- Expands one ESP32 GPIO into two, enabling multiple devices or indicators to be driven from a single pin. Makes pin reuse simpler for smart home projects and serves as a practical breadboard alternative. - Two connection options: pin header or screw terminal. Select the type that best fits your wiring and enclosure needs. - Important compatibility: designed for the 38-pin narrow version ESP32 without mounting holes. Not compatible with other ESP32 versions. - Robust double-layer PCB: traces on both sides, with one pin wired on both sides to enhance stability and provide reliable signal transmission, reducing contact issues. - Key specifications: 38-pin narrow ESP32, no mounting holes, double-layer wiring, two selectable connection types (pin header or screw terminal). - Use scenarios: - Smart home controller: split a GPIO to drive two relays or indicators from a single pin. - Breadboard prototyping: a convenient breakout to reuse GPIOs while testing circuits. - Sensor or peripheral expansion: connect a single GPIO to multiple modules, simplifying wiring on a compact layout.