UHF YU-43 wireless conference system clear and bright sound, high sensitivity and low noise, 4 channel conference capacity, 610 MHz - 840 MHz frequency range, FM adjusted method, ±45 KHz modulation, 80 Hz - 18 KHz frequency response, >105dB noise ratio, less than 0.3% distortion, 100 meter operating distance, ≥80dB spurious reduction, 250 mV / 600Ω XLR output jack, 400 mV / 3KΩ 1/4 output jack, DC 12 - 16V power supply, 100B image interfere rate, 130dB SPL maximum output sound pressure.