Model number: sx9 mini microphonecommunication: wirelessuse: computer microphone, conference microphone, karaoke microphone, other, church, stage performance,interview, speech, smart phones, recording, singing, teaching, portable audio player, communication, broadcasting, kids, gamingmaterial: metal, absfunction: noise cancelling, portable, condenser microphone, with sound cardpolar pattern: omni-directional, cardioid, figure-8, hypercardioidtype: dynamic microphone, electret condenser microphonesignal to noise ratio: 80dbfrequency response rate: 20hz-20khzmaximum spl: 110dbsensitivity: -36db±2dbfrequency range: 2.4ginput voltage: 5vmicrophone battery: 300mahreceiver battery: 300mahtransmission delay: 30ms