This is a 4GB microSDHC card (SDC44GB) that comes with a SD adapter and is pre-programmed to contain the latest Raspberry Pi Linux distribution "Raspbian Wheezy" which was released on 2015-01-31 with the 3.18 kernel. This card is compatible with the new Raspberry Pi 2 Model B, Model A+, Model B+ (as well as the older Pi 1 Models A and B)Please note as of Mid November 2016, something changed with the Pi 2 firmware and it will not work with this particular revision. Please pick up a copy of NooBs instead!