Check the listing for details. DevTu 32-bit 84MHz ARM Processor Compatible For Arduino Due R3. Condition: New. Listed at 17.95 USD. 32-bit ARM core microcontroller COMPATIBLE with Arduino Due R3. Features: Microcontroller AT91SAM3X8E Operating Voltage 3.3V Recommended Input Voltage 7-12V Min-Max Input Voltage 6-20V Digital I/O Pins 54 (of which 12 provide PWM output) Analog Input Pins 12 Analog Outputs Pins 2 Total DC Output Current on all I/O lines 130 mA DC Current for 3.3V Pin 800 mA DC Current for 5V Pin 800 mA Flash Memory 512 KB all available for the user applications SRAM 96 KB (two banks: 64KB and 32KB) Clock Speed 84 MHz Note: this board runs at 3.3V.The maximum voltage that the I/O pins can tolerate is 3.3V.Providing higher voltages, like 5V to an I/O pin could damage the board. Package Includes: 1 X DUE R3 Board SAM3X8E 32-bit ARM Cortex-M3 Control Board Module For Arduino1 X USB Cable