 The only changes to this generation of devices were to the firmware, which was made available for all previous models, and the storage capacity.Included in this firmware update was the ability to tag and later purchase songs heard on FM radio, channels which can be customized to deliver suggested songs for the user, the games Hexic and Texas Hold' em, support for audiobooks from online stores such as Audible.com and others that support OverDrive media files, a clock, and changed quicklist functionality.The ability to purchase songs from Zune Marketplace on the device while connected to the Internet via Wi-Fi was also introduced.