Steren MP3-055 Manual De Instrucciones página 28

4.- A-
Press to change radio frequency, downward.
5.- B+
Press to change radio frequency, upward.
6.- USB connector
Use it to plug an USB flash drive with MP3
files.
7.- SD slot
Use it to plug SD card with MP3 files.
8.- Audio input jack
Allow you to connect an external audio
device, such as CD player, MP3 files, among
others, with a 3.5mm connector.
9.- Car lighter connector.
7