The ESP-01 Adapter 3.3V/5V Board is designed for the ESP-01 Wi-Fi module, featuring a voltage regulator and onboard level conversion circuit. This allows seamless integration with 5V microcontrollers, making it easier to use the ESP-01 module in your projects. The board is compatible with Arduino UNO R3 or other compatible boards, enabling smooth communication between the microcontroller and the Wi-Fi module. With this adapter, you can safely power the ESP-01 from a 5V source while ensuring the correct voltage levels for proper operation, making it an ideal solution for IoT and wireless communication applications.