Shure PA411 Antenna Combiner, 9,5" 1U PSM Antenna combiner for up to 4 Shure PSM transmitter, 470 to 865 MHz, BNC out on the Front for active or passive antennas, incl. 1/4-Lambda-antenna, 4x BNC in on the rear, DC out for up to 4 units (DC cable 1 > 4 incl.), incl. powersupply and rackmount