Product description Shure UR-910 wired microphone, high sensitivity, light singing and good anti-howling -Model : UR910 -Plastic and alloy material -Type: wired microphone -Frequency response: 50Hz - 15KHz -Sensitivity (dB): 125dB -Directionality: Polar Pattern Unidirectional (cardioid), unidirectional -Sensitivity (at 1,000 Hz) -54.5 dBV/Pa (1.85 mV) open circuit -Input impedance: 150Ω (actual 300Ω) for connection to low impedance microphone input -Polarity: battery 2 Positive – battery 3 negative -The microphone head is connected to a copper pin for extremely high connection and transmission. -3-pin connector for professional audio connection -8m long microphone cable