-Connect DC5V power input socket of speaker, and to charge or recharge this apeaker system.
-With SD/MMC, U disc reader (Maximum support 2G), MP3 format music can be displayed.
-No need to shift among U disc/SD/MMC, speaker automaticlly read the first input media device. If first in put SD/MMC, you need to take out SD/MMC card, then speaker can read MP3 music file from U disc.
-Connect 3.5 mm stereo audio cable to speaker socket "LINE IN", you can enjoy the music from mobile phone, MP3 MP4 PC IPOD and other devices.