Sirus Quad R 823 - professional 4 channel UHF wireless receiver; frequency scan, volume control, auto squelch, battery level indicator and infra-red transmission of the setting from receiver to transmitter per channel; outputs: XLR male per channel, as well as 1x XLR / 6.3mm jack sum output; frequency band: 823-865 MHz; Frequency range: 40 Hz - 18 kHz; Distortion factor: <0,5% @ 1kHz; Noise floor >110dB; Sensitivity: -95~ -75dBm; Modulation type: PLL; Power supply via external plug-in power supply 12 V DC 600mA (polarity: plus inside); Removable BNC antennas; Dimensions 19"" 1U, installation depth 215mm (without antennas); Weight: 1,95 kg; Suitable accessories: handheld transmitter #502807, bodypack #502808, conference desk station #502809;