Hi, I just bought an audiophase KZ III mp3 player and I like it but the instructions have absolutley no info on how to operate it, specs or anything including how to charge the built-in battery. There aren't any plugs for adaptors. The only things on it are the usb connector and the headphone jack. There is an on/off button, play button, record, equalizer and a toggle switch for the tracks and volume. Any ideas how the battery gets recharged? Thanks