Shure ADTDUS-G57 Axient Digital PSM ADTD Dual IEM TransmitterReady for the most demanding live environments, including large scale concerts with multiple on stage performers, the Axient Digital PSM ADTD Dual IEM Transmitter from Shure allows monitor engineers, RF engineers, rental houses, and production companies to deliver two stereo channels or four mono channels of legendary Shure audio quality to their talent's ADXR bodypacks and preferred in ear monitorsall from a single rackmount unit broadcasting over a