PM-660U ------------------------------------------------------------------ Paging Microphone ------------------------------------------------------------------ Dynamic table microphone in beautifully shaped enclosure with lockable talk button Connector: Jack 6, 3 mm Directivity: Cardioid Frequency response: 100-10,000 Hz Sensitivity (1V/PA):-58 dB +/-3 dB Impedance: 600 Ohm Bal. Manufacturer: TOA Model: PM-660U