1. Mini Portable Rechargeable Speaker 2. For iPod Cellphone MP3 MP4 PC 3. built -in magnetic trumpt 4.cut fashionable model ... can be used conveniently; 4.it can connect to MP3/MP4 player, cell phone ,notebook computer, CD and walkman and so on ... -DC 5.0V connection 5.It can connect to MP3/MP4 player, cell phone ,note book computer, CK and walkman and so ...