Support for the Arduino IDE 1.0+ (OSX/Win/Linux)

Power via USB or External Source - 5V or 7-16V (12v or less recommended, automatic selection)

On-board 500ma 5V Regulator

Built-in USB (and serial debugging)

ATMEL ATTiny85 processor

6 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 the bootloader, which is already installed)

I2C and SPI (vis USI)

PWM on 3 pins (more possible with Software PWM)

ADC on 4 pins

Power LED and Test/Status LED

Size: 23mm x 17.5mm