This is a 4GB microSDHC card (SDC44GB) that comes with a SD adapter and is pre-programmed to contain Coder v9. As of March 17th, 2015, this pack comes with CODER v9 which is compatible with Raspberry Pi Models A, B and B+ as theyll as the Raspberry Pi 2 Model B.
These microSDHC cards use the new speed "class" rating of Class 4 that guarantee a minimum Data transfer rate of 4MB/sec. Adafruit may ship a Sandisk or Kingston card, both are high quality and come with the same speed class rating.
Adafruit tests and verifies each card before shipment. This image can be downloaded directly from the Coder Website Downloads Page.