Shure R189B Black, Mini-Shotgun Microphone Cartridge, Condenser, Highly directional, Threaded 1-cm-threaded cm cartridge, Compatible with all Microflex (MX) gooseneck and overhead models, including Microflex Wireless (MXW) and Microflex Complete (MXC), Directional characteristic: Lobar, Frequency response: 50 - 17,000 Hz, Sensitivity: -33 dBV, Max. SPL (sound pressure level): 121 dB, Signal-to-noise ratio: 68 dB, Colour: Black@+*Note:* Phantom power is required.@+@+