sorry to beat a dead horse here but i can't begin to tell everyone how much i hate this kit....an aux in would be SO MUCH BETTER....6 playlists that can hold 99 songs each...there's just no way to categorize in a way to make it easy to play what you want to hear...i've tried everything from genre to alphabetical listings....i only have about 1000 songs on my iphone but can't figure out any logical convenient way to play them using this procedure.....Dani, sorry i missed your question earlier...my build date is 08/2006