ESP32-S3-Zero-M and ESP32-S3-Zero mini development board is based on ESP32-S3FH4R2 dual-core processor with 240MHz running frequency, 2.4GHz Wi-Fi and Bluetooth 5, built-in 512KB SRAM and 384KB ROM, stacked 4MB Flash and 2MB PSRAM, using stamp hole design, leading to 24 GPIOs.