BY-BM3032 Directional camera microphone Features Works with DSLR cameras, camcorders, voice recorders Excellent off-axis attenuation Supercardioid directivity Low noise and distortion Frequency response from 20Hz to 20kHz Safe channel function with right channel Automatic power function Three-stage high-pass filter (0Hz, 75Hz, 150Hz) Three-position level control (-10dB, 0, + 20dB) 3.5mm minijack output (1/8 \ ") Includes fur windshield 2 * 1.5V battery powered Overview: BOYA BY-BM3032 is a super cardioid camera shotgun that provides directional audio capture, adjustable gain (-10dB, 0, + 20dB), High-pass filters (0Hz, 75Hz, 150Hz) and wide device compatibility for video production, vloggers, YouTubers and audio engineers. Has also a safe option There is a reverse channel on the right channel that helps you select the desired audio level when you are unsure how loud the audio is being picked up or what unexpected conditions may be. And a selectable 5dB boost button for high frequencies may allow use in certain situations, such as using a microphone with a fur windshield outside. When using the 3.5mm TRS jack, the microphone can be used to capture audio from camcorders, DSLRs and camcorders. Can run for approximately 30 hours on two AA batteries. Acoustic Principle: Linear Gradient Output Polar Pattern: Supercardioid Frequency Response: 20-20,000 Hz Sensitivity: -30 3dB (0dB = 1V / Pa at 1dB) Output impedance: 200 Signal to noise ratio: 85dB Gain control: -10dB, 0dB, + 20dB Low Cut: 0Hz, 75Hz, 150Hz Power supply: 2 AA batteries Battery life: 30 hours Dimensions: 209.7 x 103.3 x 50 mm Weight: 180g