• USB-C port - This is used for both powering and programming the board. You can power it with any USB C cable.
• 3V - This pin is the output from the 3.3V regulator, it can supply 600mA peak.
• GND - This is the common ground for all power and logic.
• 5V - This is 5V out from the USB port. 

The CH32V203G6 has a single 32-bit RISC-V core, running up to 144MHz, with 1-cycle multiply/divide. Inside is 10KB SRAM, 32KB single-cycle Flash as well as an additional 'external XIP' 224KB of Flash that can be used for program or data storage but it's not as fast as the 32KB. There are also extras you expect: ADC, timers, USB device, UART, I2C and SPI.

There are ten GPIO pins broken out to pins. There is hardware I2C, UART, and SPI. All of the GPIO have an ADC input.

This JST SH 4-pin STEMMA QT connector is located at the back of the board. It allows you to connect to various breakouts and sensors with STEMMA QT connectors or to other things using assorted associated accessories. It works great with any STEMMA QT or Qwiic sensor/device. You can also use it with Grove I2C devices thanks to this handy cable.

Next to the BOOT button, in the center of the board, is the RGB NeoPixel LED. This addressable LED can be controlled with code. It is connected to PA4.

• Reset button - This button restarts the board and helps enter the bootloader. You can click it once to reset the board without unplugging the USB cable or battery.
• BOOT button - This button is connected to PB8/BOOT0. To enter bootloader mode, disconnect the QT Py from USB power. Hold down the BOOT button and reconnect USB power.