Our professional 6 inch goose neck adjustable desk/table top microphone has a dual impedance of a 50k ohm high to a 600 ohm low. It features a momentary talk switch for priority paging, lock down switch for continuous usage, and a Cannon 3 pin XLR male connector. It offers a frequency response 80 to 12 kHz with a sensitivity of -53dB /- 3dB high to -71dB /- 3dB low.