The GW3323 EVAL Board offers a modular core board and an optional expansion board to meet diverse development needs. Two core board options, GW3323HGU6, and GW3323HIU6/HJU6, integrate key interfaces such as custom buttons, a MicroSD (TF) slot, USB communication, chip programming, and battery power. The expansion board adds an LCD socket, OLED socket, speaker, microphone, and USB-to-UART interface for enhanced application development and testing.