BOYA BY-BM3051S - shotgun microphone for cameras and audio recorders BOYA BY-BM3051S is an upgraded version of shotgun microphone for SLR cameras, compact cameras and audio recorders. It offers broadcast-quality sound with a wide frequency response from 20 Hz to 20 kHz. Perfect for filmmakers, youtubers, podcasts and more. & Nbsp; The MONO / Stereo switch allows you to switch to precise directional or stereo (omni-directional) sound. It has a three-level switch for gain control. (-10, 0, 20dB). The high-pass filter can be set flat or 75 Hz to eliminate low-frequency hum and rumble. The BY-BM3051s is equipped with an automatic power on / off function depending on whether or not it is powered from an outlet and can be powered two AA batteries (not included). The batteries provide up to 30 hours of continuous use. With a 3.5mm headphone output on the panel and an integrated shock mount, it allows users to monitor audio recording and inhibits the formation of background noise. Specifications Technical: Characteristics: supercardioid / stereo (omnidirectional) \ n Frequency response: 20Hz - 20kHz \ n Sensitivity: -30dB (/ - 3dB) at 1kHz \ n < li> Signal to noise ratio: 82 dB \ n Dynamics: 120 dB \ n Output impedance: 50 \ n Power supply: 2x AA fingers (not included) \ n Working time with with batteries: 30 hours \ n Gain switch: -10dB, 0dB, 20dB \ n High-pass filter: two-stage (flat, 75 Hz) \ n Output connectors: 3.5mm stereo mini-jack & nbsp; \ n Dimensions: & nbsp; 184 65 133 mm \ n "