Shure BLX188CVL-K14 The Shure BLX188CVL-K14 is a professional dual wireless lavalier microphone system perfect for presentation, broadcast, and public addressing applications. The system comprises of a dual channel receiver operating on the K14 (614-638 MHz) frequency band, 2x body pack transmitters, and 2x high quality Shure CVL lapel microphones. Like the rest of the BLX wireless family, this system feature internal microphone antennae and a handy quick scan frequency for fast and easy set-up. The BLX188CVL bodypack provide up to 14 hour run time from 2 AA batteries, can support up to 12 compatible systems (channels) per frequency band, making it ideal for use with smaller scale production and with other wireless systems. Perfect for anyone needing a lightweight great sounding system to amplify their speech or presentation.