Most of the midrange and high-end wireless mic systems will operate over an extended bandwidth-with a typical minimum of 5-10 TV channels (30-60 MHz) and in some cases the entire 470-608 MHz legal band in the U.S. Also, RF planning software and hardware is available to help determine the layout of larger multi-channel systems.

Innovations include new ways of detecting and avoiding interference, increasing the discrimination of wireless receivers and refining the transmission signal, widening the operating range so that the equipment can encounter and tune to clear frequencies nearly everywhere, exploring other frequency bands such as 1.9 and 2.4 GHz, taking advantage of digital transmission and DSP, and increasing spectral efficiency so that more channels can fit into the smaller swath of available frequencies.