... expansion cards and LAN-IN interface, LAN-IN interface interface external mp3, notebooks, MD, CD audio, etc.The four ... player, PVC Diaphragm speakers to enhance the treble part, sound Qingli clean up fully, without any impurities, and ... lithium······High performance dual speaker······As a speaker,an external sound source······Recording function·--·-·Repeat function·--·-·The lyrics display·--·-·File ...