STMicroelectronics STM32 Nucleo-64 MCU Development Board NUCLEO-L412KB

STM32 microcontrollers in 32-pin packages
Three LEDs: USB communication (LD1), power LED (LD2) and user LED (LD3)
Reset push-button
Board expansion connector:
Arduino™ Nano
Flexible power-supply options: ST-LINK USB VBUS or external sources
On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability: mass storage, Virtual COM port and debug port
Support of a wide choice of Integrated Development Environments (IDEs) including IAR™, Keil®, GCC-based IDEs, Arm® Mbed™
Arm® Mbed Enabled™ compliant (only for some Nucleo part numbers)