The STM32F411 Base Board provides a flexible base for the low-cost WeAct Studios' BlackPill v3.1 USB Stick board. The development board includes common user interface devices and ports for external devices. (The BlackPill is not included.)

It includes several on-board user interface devices and port headers for external devices. Each device has an independent connection port and is wired to power (reducing wire clutter). To improve inter-connections and further reduce clutter, the devices and ports are distributed around the periphery of the board. The ports support external communication devices commonly required by projects (e.g. UART, I2C, and SPI devices).

The STM32F411 Base Board holds the BlackPill board by way of a pair of 20-pin female headers. A separate pair of 20-pin male headers stand adjacent to the BlackPill. Commonly available DuPont female-to-female wires can attach to the male pins to form sturdy connections to on board devices and DuPont female-to-male wire to off board devices (e.g. bread boards).

https://www.youtube.com/watch?v=VYYiyMalOCI