Stereo Mic Compact and lightweight design Closely matched elements provide the spatial impact and realism of a live sound field and excellent channel separation Switchable low-frequency roll-off 2 cardioid elements Frequency response: 30Hz-20kHz The Audio-Technica AT822 Stereo Condenser Microphone's compact and lightweight design is perfect for camera-mount use Closely matched elements provide the spatial impact and realism of a live sound field and excellent channel separation The Audio-Technica AT822 features a switchable low-frequency roll-off 2 cardioid elements