The Sennheiser SKM-9000 pro UHF Wireless Microphone is the latest generation of it's company UHF plc synthesized units. Representing a major breakthrough in both price and performance, it offers the superior performance, convenience and operational advantage of a top frequency - agile UHF Wireless system. The system delivers 32 user auto - selectable channels within any of several available 25 MHz wide bands in the uncluttered wide-open high UHF range ( 790 - 865 MHz) for optimal clear channel capability in any position.