The new 16-channel UHF frequencies expand the capability and range of earlier two-channel models by allowing multiple mic users in the same venue to select separate channels. The additional channels also enable users to avoid interference with competing wireless frequencies, assuring no frequency mix in any venue.
The new AmpliVox 16-channel UHF microphones are available as a handheld wireless mic or can be ordered in a bodypack-style transmitter with receiver.
You can find out more about AmpliVox here.