The ECM-W3s comprises a microphone-transmitter featuring high signal-to-noise (S/N) ratio microphone units, and a single-channel receiver. The transmitter and receiver process audio digitally and transmit it wirelessly, allowing the capture and recording of one speakers' voices with superb clarity and low noise. | Sony | | ECMW3S Single-channel Wireless Omnidirectional Microphone | Black | Best Buy