Arduino Due with Headers [A000062] – 32-bit ARM Cortex-M3, 84MHz, 54 Digital I/O Pins, 12 Analog Inputs, 512KB Flash, USB Host, Pre-Soldered Headers, Compatible with Arduino IDE for Advanced Projects

The Arduino Due is more than double Arduino Uno as the core of your projects and devices. It's powered by the Microchip AT91SAM3X8E microcontroller, which features a ARM Cortex-M3 32-bit processor. Connect it to a computer with a micro-USB cable and easily program it. If you like, power it with a Lithium battery. Just be aware that the maximum voltage the I/O pins can tolerate is 3.3V: voltages higher could damage the board.