Features:

• ATmega328 running at 16MHz with external resonator (0.5% tolerance)
• USB connection off board
• Supports auto-reset
• 5V regulator
• Max 150mA output
• Over current protected
• Reverse polarity protected
• DC input 5V up to 12V
• On board Power and Status LEDs
• Analog pins: 8
• Digital I/O: 14

Dimensions:

• 0.7x1.3" (18x33mm)
• Less than 2 grams