Shure explains a whole boatload of features for its UHF4 receivers. The UHF4 wireless receiver's bandwith lets you play with ten TV channels worth of UHF spectrum. The auto-scan lets you know which frequencies are clean, and can set your receiver to that freq. Setup is a breeze with features like this. There is also a network function that allows you to set all your connected receivers to clean freqs located in that scan.