... MP3 & Mp4 mini speaker, computer speaker, speaker,mini computer speaker, usb computer speaker, 2.0 usb speaker, computer 2.0 speaker, notebook speaker, portable speaker, promotional speaker,Promotion gift speaker ... box with new concept integral stereo portable mobile music, connecting your MP3, MP4, CD, DVD, iPod, iPhone, GPS, ... use computer 5V or power adapter 5V.Music may stop when voltage is above 6V ...