JBL Vm860 Sound with crystal clear vocal clarity and detail. Sound your best and hit the high notes with no distortion or delay. Just plug the wireless dual-channel receiver into your speaker, turn on the mics, and you're ready to shine.A wireless microphone system consists of a transmitter and a receiver. The transmitter receives an audio signal and then processes it through air with ultra-high frequency modulation. The receiver then listens for this modulated signal and demodulates