The Adafruit Feather M4 Express is a powerful microcontroller board based on the ATSAMD51J19, featuring a 120MHz Cortex M4 processor with floating-point support. It's perfect for advanced IoT projects, audio processing, and wearable electronics within the Feather ecosystem.

Processor: 32-bit 120MHz Cortex M4 (ATSAMD51J19) Flash Memory: 512KB RAM: 192KB Operating Voltage: 3.3V Input Voltage: 3.7V - 6V (via battery or USB) Digital I/O Pins: 21 (all PWM capable) Analog Input Pins: 7 (12-bit ADC) Analog Output Pins: 1 (12-bit DAC) Interfaces: I2C, SPI, UART, USB Native Dimensions: 51mm x 23mm x 3mm (approx) Weight: 5g Battery Charging: LiPo support via JST connector Clock Speed: 120MHz Form Factor: Feather

