UHF 516-685 MHz, adopt PLL combined technology, 48 Mic. (12 Sets System) can be used simultaneously without interference * 4 Independent 1/4" Outputs with One 1/4" Mixed Audio Output & One XLR Mixed Audio Output * U-Voice UVC863 Condenser Lavalier Microphone Omnidirectional * Receiver Power Supply: AC 110V & Transmitter Power supply :2 AA batteries * 300 ft. operating range