With excellect cardioid polar pattern,the GM18CB can clearly capture the voice in front of the mic,designed to provide clear and intelligible speech reproduction for lectures,video conferences,meetings,and more. The BY-GM18CB's shaft features upper and lower goosenck sections that enable you to precisely position the capsule in front of the speaker for optimal sound.ON/OFF status is clearly indicated by the LED ring below the mic capsule. the BY-GM18CB can be powered by 2 AAA batteries or XLR 48V Phantom power.