Shure KSM9. Type: Stage/performance microphone, Microphone frequency: 50 - 20000 Hz, Microphone input impedance: 150 O. Connectivity technology: Wireless. Product colour: Black. Signal-to-Noise Ratio (SNR): 72 dB, Dynamic range: 150 dB. Operating voltage: 48 V, Power consumption: 5.2 mA