Sondpex FM Transmitter and MP3/WMA Player with RDS (PMT402) With its RDS technology it can transmit song title and artists name to the screen of your car head unit Built-in 1.4" large LCD screen to display the song title and artists name It plays MP3 or WMA music files straight from USB stick or SD card (support memory up to 32 GB) Built-in 1/8" / 3.5 mm AUX input to play music from any mobile devices such as cell phones or MP3 players 7 Loop Modes: Repeat all-&gt;Random-&gt;Intro-&gt;Normal-&gt;Repeat one-&gt;Folder-&gt;Repeat Folder. These modes come in very handy to narrow down the music you want, when you want it.