Toa PM-660U Desktop Paging Microphone-600 Ohms-Balanced-Ptt Switch-6' Unterminated 4-Conductor Cable

Moving coil microphone Polar Pattern: Unidirectional Rated Impedance: 600 ?, Balanced Rated Sensitivity: -58 dB (1 kHz, 0 dB=1 V/Pa) Frequency Response: 100 Hz - 10 kHz Output: ?5.0 (?0.2"), 4-conductor (2-shielded) cable (2.5 m (98.43")) without plug Talk Switch 1-push-to-talk switch, 1-locking lever, Short-off type Remote Control: 500 mA or less at 30 V DC Finish: Microphone head: Zinc plated steel wire, gray baked paint Main unit: ABS resin, gray