Brand name: bnk model number: bk712 style: goose-neck microphone communication: wireless main features: 1.can connect with mixer and karaoke amplifier,use the ultra long distance's cable 2.dual channel receiver,totally 8 frequency group. 3.use anti-jamming sound filter,fully eliminate the interference signal. 4.output digital volume control,high fidelity audio output,wide power supply range(9v-12v) 5.built-in battery management module circuit,protect battery from damage. 6. use: conference microphone ,can be used as pulpit/ podium microphone , studio microphone very sensitive material: metal hand held microphone sensitivity: -47db/+-3db(1khz) polar pattern: one direction hot selling professional flexible gooseneck condenser microphone bk712, view professional flexible gooseneck .