Shure ANX4US Scalable Wireless Receiver For Axient Digital and ULX-D SystemsThe ultimate high tier, high channel count wireless receiver, Shure ANX4 receives up to 16 channels of Shure Axient Digital or 24 channels of Shure ULX D wireless audio in a single rack space. Delivering maximum flexibility, ANX4 does not ship preconfigured with active wireless channels, allowing you the opportunity to purchase channels in single and four channel increments and activate the exact number of channels you need. Licenses can be activated