Based on ESP32-C3FH4, onboard multi-function GPIO pins. Castellated Module, Suitable For SMD Applications. Board Specifications Low-power SoC equipped with RISC-V 32-bit single-core processor, up to 160MHz main frequency Supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth® 5 (LE) 400KB of SRAM and 384KB ROM, and 4MB of onboard Flash memory Castellated module and onboard ceramic antenna, allows soldering direct to carrier boards Supports flexible clock, module power supply independent setting, and other controls to realize low power consumption in different scenarios Integrated with USB serial port full-speed controller, 15 × GPIO pins allows flexibly configuring pin functions 3 × SPI, 1 × I2C, 2 × UART, 1 × I2S, 2 × ADC, etc. What's On Board USB Type-C Port BOOT buttonPress it and then press the RESET button to enter download mode RESET button WS2812 RGB LED ME6217C33M5GLow dropout regulator, 800mA output (Max.) ESP32-C3FH4 single-core processorup to 160MHz operating frequency 2.4G ceramic antenna Pin Definition Outline Dimensions Documentation Wiki: http://www.waveshare.com/wiki/ESP32-C3-Zero