This microphone combined both wired and wireless functions. Wireless let you singing free of dragging cord. Wired let you singing without the concern of battery power off. You can use this for speeches｣ｬ lectures｣ｬ meetings｣ｬ karaoke｣ｬ music performances or anything else.Easy operation and convenient use. You will love it! Buy it today! You can t miss it.<br />Feature:<br /><br />    100% brand new and high quality<br /><br />    2in1 Wired & Wireless functions<br /><br />    Wireless let you singing free of dragging cord<br /><br />    Wired let you singing without the concern of battery power off<br /><br />Specifications:<br /><br />    The length of the Microphone Cord:2.5m<br /><br />    Package weight:9.3 oz/263g<br /><br />    Microphone sensitivity: -54dB 3dB(0dB=1V/Pa)<br /><br />    Directivity: Un-directional<br /><br />    Frequency response: 100Hz-10｣ｬ000Hz<br /><br />    Out put impedance: 600ohm<br /><br />    Operating voltage: DC 1.5V<br /><br />    Working distance: 8-20m<br /><br />    Impedance:600 ohm<br /><br />    S/N ration: 60dB<br /><br />    Reception sensitivity:30dB/uV<br /><br />    Products using the power: 1X AA Battery (Not include battery)<br /><br />How to use:<br /><br />    Easy operation<br /><br />Wired: <br /><br />    Make sure the battery is not in the Microphone. And plug the cord to the microphone and your audio amplifier. <br /><br />    Switch microphone to MIC position｣ｬ and start to sing.<