Description Wired Headset Condenser Microphone Suitable for Imam Azan Masjid Surau Praying. Works with one AA 1.5 v Alkaline Battery. Specification Brand Minkez Model MM701 Microphone Type Condenser Microphone Frequency Response 100 Hz – 16 K Hz Pattern Super-Cardioid Pattern Output Impedance 2 K Ohm Sensitivity – 44 dB +- 2 dB Pickup Distance 20 cm to 50 cm Cable Length 5 m Dimensions 240 x 155 mm Weight 2.1 kg