Protable АС (I-Bird)

A kind of special speaker, but there is no sound device inside. It depends on a high-technical crystal to shake any hard surface, like wood, glass, wall, stone and so on, and make hard surface send out the music.
Attractive function: Wireless;
Build-in MP3 with 2GB memory;
Build-in battery, chargable with USB wire;
Cupul help fix it on the glazed surface;
Power on/off button;
Pause/play switch, LED light button, can shine;
Volume control buttom;
Songs switch button.