It is a professional stereo sound recording mic specially designed for photography, interview and other professional occasions using mid-to-high-end camera/camcorders. Its built-in high-performance mic and X-Y stereo pickup technology contributes to clear and stable sound localization and wide frequency response range, making it a nice partner for audio recording.   Features: X-Y stereo pickup technology ensure clear and stable sound localization.  -10dB sensitivity switch helps to reduce some environmental noise.  The NCR denosie pickup technology features excellent noise reduction capacity.  Switch on the low-cut filter to reduce low-frequency noise.  The specially designed shock absorbing construction can reduce mechanical noise of camera and other vibration.  Alloy tone tube makes it strong, secure and effective on shielding electromagnetic interference.  All metal shell + surface anodic oxidation processed design, it is solid, delicate & professional in every detail.  Standard 3.5mm jack output fit for camera of various brand. Universal hot shoe mount can be mounted on camera top easily.  Powered by 1pcs AAA/LR03 battery (not included), new battery can last for about 70h, and there is a low power indicator.   Specifications: Monomer: Electret Condenser Monomer;  Directivity: Unidirectional Stereo Sound;  Frequency Response: 40Hz-16KHz;  Sensitivity: -30dB ± 3dB (0dB = 1V/Pa at 1KHz);  Sensitivity Attenuation: -10dB;  Low Frequency Attenuation: 60Hz 10dB/Octave;  Equivalent Noise Level: 24dB A;  Maximum SPL: 130dB (THD≤1.5% at 1KHz);  Output Impedance: 200Ω ± 30% (at 1KHz);  Battery Type: 1pcs 1.5V AAA/LR03 Battery (Not included.);  Battery Endurance: ≥70h continuous operation for new battery.;  Item Size: 13.2 * 3.6 * 2.4cm / 5.2 * 1.4 * 0.9";  Item Weight: 110g / 3.9oz;  Package Size: 17.3 * 14 * 6cm / 6.8 * 5.5 * 2.4";  Package Weight: 228g / 8oz;   Package List: 1 * Microphone;  1 * Foam Cover;  1 * User Manual;   Note: Camera and battery are not included.