 In the case of the Zune 4, 8, 16, 30, 80, and 120 players, the most current player software version is 3.3, which provides compatibility with Zune 4.2.Version 3.3 was primarily a bug fix release and was released on January 26, 2010.The operating system for the Zune devices is based on the Windows CE kernel for ARM architecture and uses a distribution similar to the Portable Media Center found on the Gigabeat S. Zune's native file compatible formats are