The SM7B dynamic microphone has a smooth, flat, wide-range frequency response appropriate for music and speech in all professional audio applications. It features excellent shielding against electromagnetic hum generated by computer monitors, neon lights, and other electrical devices. The SM7B has been updated from earlier models with an improved bracket design that offers greater stability. In addition to its standard windscreen, it also includes the A7WS windscreen for close-talk applications. Popular radio and TV mic features excellent shielding against electromagnetic hum. Plus mounting bracket. Impedance: 150 ohms for connection to microphone inputs rated at 19 to 300 ohms. The SM7B does NOT require phantom power and is not affected if phantom power is present on its mixer input. Note that some third-party external pre-amps commonly used with the SM7B DO require phantom power to operate, however. At least 60dB of gain is recommended to get that iconic warm and balanced tone most commonly associated with the SM7B.