500 series models were introduced in October 2006 as 500 (national mapping) and 550 (continental). These models include 3.5" 320x240 color screen, MP3 player, text-to-speech and Bluetooth. 550 includes support for XM radio. The 590 (released July 2014) sports a 5" diagonal screen, can operate in portrait or landscape mode and can also stream music from the user's iPhone with Pandora. There is currently no Pandora support for Android phones.
