This Extension Board (GPIO Extender) is compatible with both versions 1 and 2 of the Raspberry Pi Computer - for version 2 computers, note that the GPIO #21 has been replaced with GPIO #27 and that the I2C pins are now I2C port #1 instead of #0. All other pins are the same. Also recommend you the 26P GPIO Ribbon Cable Wire for Raspberry Pi and Basic Bread Board to breakout the Pi pins.