Shure BLX14/CVL Wireless Lavalier Microphone System | Frequency: H11 (572-596 MHz)The Shure BLX14 CVL Wireless Lavalier Microphone System is the perfect way to go wireless with your presentations. A popular choice for houses of worship and large business meetings or presentations, this lavalier system generates big sound while keeping its components compact and less visually distracting. It includes a BLX4 Wireless Receiver, a BLX1 Bodypack Transmitter, and a CVL Lavalier Microphone, as well as a power supply, lavalier clip, and