All electronics ship with US style plugs.You may need a voltage converter or a plug adapter.
Special Features
Support for the IDE 1.0+ (OSX/Win/Linux)
Power via USB or External Source - 5v or 7-35v (automatic selection). On-board 500ma 5V Regulator. Built-in USB (and serial debugging)
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 bootloader)
I2C and SPI (vis USI). PWM on 3 pins (more possible with Software PWM)
ADC on 4 pins. Power LED and Test/Status LED (on Pin0)