Features

• Support for the Arduino IDE 1.0+ (OSX/Win/Linux)
• Power via USB or External Source - 5v or 7-35v (12v or less recommended, automatic selection)
• On-board 500ma 5V Regulator
• Built-in USB
• 26 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB)
• 8k Flash Memory (about 6k after bootloader)
• I2C and SPI
• 26-PWM (26 pins with Software PWM, only two(D9,D10) with hardware PWM )
• ADC on 8 pins
• Power LED and Test / Status LED
• Size(mm): 44.5x18.3x3