1.Factory New Patent good to marcket 2.high-fidelity, high resolution DIGITAL stereo effect. 3. ... 7, 3.5mm audio input interface for portable CD, MD, MP3, MP4, PDA, PC, IPOD, DVD, etc, any player 8 with ... audio plugs 9, with USB interface, with charging function (direct to MP3 power supply or battery charging) 10, transmitter, charger, frame one ...