Electret condensor gooseneck (23 cm) microphone Suitable for conference rooms Switch: on/stand by/off Jack connector (3,5mm + 6,3mm) Type: Electret Condensor Polar Pattern: Omnidirectional Freq. Response: 70 - 16.000 Hz Sensitivity: -66 dB / ±3 dB Impedance: 1000 Ohm Operat. Voltage: 1,5V (LR-44 battery included)