Shure wireless dual lavalier systemPlease note that a valid licence is required to operate wireless equipment in Channel 38. The BLX188 CVL Dual Channel Lavalier Wireless System is part of the BLX wireless systems family. Shure BLX Wireless Systems combine professional quality sound with simple setup and an intuitive interface for legendary audio performance right out of the box. Precision built and available in a variety of configurations, its the most accessible way to own the stage.