Multi-Function Docking Station Charger Speaker for iPhone 5/4/4S,iPad 2/3/4/iPad mini,Samsung device-Silver The Micro USB supports Galaxy S2, Galaxy S3, Galaxy Note2, but only for charging for other brand mobiles. The audio digital amplifier adopts 2.0-channel high-power output; With 3.5mm LINE IN port,support other external speaker device(Like MP3,MP4 and so on); Four functional electronic switch (audio switch, audio input selection, volume + and volume -), easy to use; Support iPad horizontal and vertical screen.