Sony Wireless Microphone - ECMW3S
Single-channel wireless microphone for high-quality digital recording
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 speaker’s voice with superb clarity and low noise.

Or as low as $82.48/month over 6 months.