The Blackmore Pro Audio BMP-4 Wired Unidirectional Dynamic Microphone is a wired, unidirectional, dynamic microphone with a 10 ft. cable and XLR or 1/4 in input connectivity. It has a frequency range 50 Hz to 16,000 Hz, a nominal impedance of 600 ohms, and an on/off switch. This microphone is best suited for public addresses and vocals.