Rannsgeer UHF R288UF 4 Channel Headband Headset & Lapel Wireless MicrophonePackage includes: UHF 4 Channel 128 Frequency Selectable Receiver: 1Receiver Antennas: 4AC/DC adaptor: 1UHF Body-Pack Transmitter: 4Detachable Headband Headset Mic: 4Lapel Mic: 41.5V battery: 81/4" - 1/4" cable: 4* Rack Mount Kit Features: * UHF 516-585 MHz, adopt PLL combined technology, 48 Mic. (12 Sets System) can be used simultaneously without interference . * CPU control with LCD display makes operation easy and performance outstanding . * Audio compressing-expanding technology ,the machine can reduce the noises and increase the dynamic range. * Backsound restrain function can avoid backsound scream * The receiver adopt multi-level high frequency enlargement .so and has the high sensitivity . * Multi-level noise supervisory circuit .Special with the tone locked system make the machine have a strong anti-jamming characteristics. * 4 Independent 1/4" Outputs * One 1/4" Mixed Audio Output * One XLR Mixed Audio Output * Robust metal housing. Specifications * Frequency range :UHF 516-585 MHz * PLL Synthesized Control * Frequency stability :<±10ppm * Sensitivity: 3uV 30Db S/N * T.H.D distortion :100dB * Frequency response :40Hz -18KHz * Audio frequency output : Balanced output :0-500mV; Unbalanced output 0-300mV * Power Supply: AC 110V * Noise locked & Pilot tone locked * Power consumption: 5W * Transmitter Gain Switch: High 10dBm; Low 5dBm (2 gain setting avallable) * Transmitter Gain adjusting :-20dB to 30dB * Transmitter Modulate mode : FM, F3F * Transmitter Modulation Depth: UHF <=50KHz * Transmitter Power: 10mV * Transmitter Power supply :2 AA batteries * Battery Life: 6~8 hours * 300 ft. operating range