There are two types of UK Wireless Microphone Licence. UHF - UK wide shared access to Channel 38 (606.500-613.500 MHz) internally or externally and licensed on a non-protected basis for either one or two years. Users can typically achieve 10 radio microphones in this range operating in the same place at the same time. However this can differ case by case. Access is not restricted to specific frequencies and users can re tune within the stated range to any usable frequency. VHF - UK wide shared access to 15 spot frequencies in the range 175.250 to 209.800 MHz internally or externally and licensed on a non-protected basis for one year only. These licences are popular due to the one off purchase with no requirement to notify us of where or when these channels are being used. However as the channels are shared users must be prepared to retune to alternative frequencies if interference from other local users is experienced.