Wireless SocketBLE, WIFI, GSM, 3G, LTE, ... We use the XBEE "form-factor" here.
ProcessorThe same Atmel SAM3X8E processor used on Arduino DUE - a 32-bit ARM Cortex M3 architecture running at 84MHz.
MicroSD Card SocketHSMCI (or SPI) interface for all your high speed data logging needs. RTOS anyone?
Micro USBUSB 2.0 also allows M2 to act as both a USB Device and Host.
LEDs5 one-color and 1 RGB programmable indicators. Great for debugging.
Memory 32k EEPROM for non-volatile memory via I2C, 512 KB for the user applications, 96 KB SRAM.
GPIO Pins6 Automotive level IO Pins to Control 12V devices (Examples: relays, fans, lights, etc) OR act as analog input (like temp sensor).
Power Supplies5V@ 3 amps, 3.3V@ 1 amp for connecting add-ons with worrying about power issues.
Automotive interface Circuits2 channels of CAN, 2 channels of LIN/ K-line, J1850 VPW/PWM, Single-wire CAN interfaces for maximum car compatibility.