Combine all 4 transmitting antennas of your SR IEM G4 units – and also provide the units with power, all via the included 4 x BNC 50 ohm cables. By combining your multiple transmitters into one device, you can dramatically improve the RF integrity of your show / venue.Try sticking an A2003-UHF antenna on the end of this to really improve your wireless setup.Unlike the previous (G3) version (AC3), this AC41 now comes with NT3-1 power supply, included in the box.AC41 is backwards compatible – works happily with either G4 or G3 in-ear monitoring transmitters.In the box:AC 41 antenna combiner4 x BNC cables1 x NT3-1 power supply