Starting in 2004, Microsoft PlaysForSure was a certification given by Microsoft to portable evices and content services which had been tested against several hundred compatibility and performance requirements. These requirements include codec support, DRM support, UI responsiveness, device performance, compatibility with Windows Media Player, synchronization performance, and so on. PlaysForSure certification was required for portable media players, network-attached digital media receivers, and media-enabled mobile phones seeking the "Designed for Windows Vista Premium" logo. The PlaysForSure logo was applied to device packaging as well as to online music stores and online video stores.