... woofer,horn tweeter 4.RMS power: 300W pa system TV-15DBuilt-in MP3 player and DVD playerUSB, ... Low signal to noise ratio.3. All new design of switching power circuit can transfer 12V DC ... Dual channels UHF or VHF fix frequency wireless system optional (UHF have 50 to 70 wireless transmission ... memory card,MP3,MP47.Built-in advanced receiver modular system with two wireless mics (handheld ,lavalier ,and ...