New Multifunction Dual Docking Station Charger Speaker for iPad iPhone iPod Samsung (Red) Local fast freeshipping Dual function (charger & audio speaker) for iPhone 4, 4S; iPad 2, 3; iPod Touch 4; Samsung Galaxy S2, S3, Note2 With 3.5mm line in port, support other external speaker device (Like PC, laptop, tablet, cellphone, MP3, MP4 and so on) The audio digital amplifier adopts 2.0-channel high-power output Four functional electronic switch (audio switch, audio input selection, volume + and volume -), easy to use