... Install with Dual channels UHF or VHF fix frequency wireless system optional (UHF have 50 to 70 wireless transmission distance,VHF ... 8.High fidelity cassette player,high sensitive wireless mic ,advanced double surface SMT circuit9.Built-in DVD player , can play DVD ... flash memory card,MP3,MP411.Built-in advanced receiver modular system with two wireless mics (handheld ,lavalier ,and clip type optional ...