1.TF card mini speaker with recahrgeable battery 2.Small size, ... the appearance of a unique mini digital audio. 3. The new aluminum diaphragm micro-speaker, clear treble, bass, pure ... beeter. 4. New concept of integrated digital audio player, connect your MP3, MP4, CD, DVD, iPod, iPhone, PSP, ... download, you can change the music anytime, anywhere. Speaker function parameters: output power RMS 3W THD=10% ...