The SHURE's PA411 combines the antennae of up to four PT3 wireless transmitters into a single unit with a single antenna, eliminating the need to fight to close the rack lid or search in the dark for a misplaced antenna. This audio monitoring has a half-rack system that reduces the number of antennas and power supply required when many systems are used in applications such as live stage, theatre, rehearsals, and more. It also include an RF LED indication display that indicates the presence of a signal as well as the presence of a signal overload, and a power switch on the front panel.