If you think you have received the wrong product, please contact us and give us a chance to correct it,We also have tech support, just contact us on Amazon,thank you. 5V and G (GND) pins 3V3 and G (GND) pins N8R2 USB-to-UART Port and ESP32-S3 USB Port (either one or both), default power supply (recommended) If you have problem, please contact us,We have professional after-sales The black painted area is LED