LD Systems U505 CS 4, 4-Channel Wireless Conference System, 4 channels, Frequency range: 554 - 586 MHz, Audio output: 4x XLR balanced, Audio output ""Mix"": XLR balanced, Antenna connector: BNC, 106 channels in 6 groups, OLED display, Operating voltage: 12 V DC (1000 mA), Dimensions of conference system (W x H x D): 484 x 44 x 243 mm, Weight of conference system: 6 kg, Dimensions of microphone base (W x H x D): 115 x 54 x 135 mm, Weight of microphone base: 0.73 kg