Adafruit Metro M4 Development Board is designed to evaluate Microchip ATSAMD51. This ATSAMD51 is a 32-bit Arm® Cortex® - M4F MCU that offers extensive connectivity interfaces, powerful performance, and robust hardware-based security for a variety of applications. The Metro M4 board is powerful and fast board with its 120MHz Cortex M4 with floating point support. The Development Board comes with onboard USB support that allows any computer to communicate to the Metro. The Metro M4 is Arduino compatible where easy reprogramming comes pre-loaded with the UF2 bootloader.