professional amplifier:DVD player, support DVD, DVCD, SVCD, VCD, CD;USB connector: support Flash memory card, MP3, MP4. CONFIGUREMmplifie:rDVD player, support DVD, DVCD, SVCD, VCD, CD;USB connector: support Flash memory card, MP3, MP4.High sensitivity wireless microphone;Advanced double surface SMT circuit l Power supply: AC 110-240V, built-in three 6V/7AH rechargeable batteriesl Frequency ...