The ESP32-WROOM-32U-N4 is a compact Wi-Fi and Bluetooth MCU module based on the dual-core ESP32-D0WD, running up to 240 MHz with 4 MB flash and 520 KB SRAM. Featuring a U.FL connector for external antennas, it supports 2.4 GHz Wi-Fi, Bluetooth v4.2, wide industrial temperature operation, and multiple interfaces for flexible IoT designs.