Features: High sensitivity condenser microphone specially designed for camera. Cardioid directivity characteristic can effectively reduce the ambient noise. Optional +10dB sensitivity tone up and 200Hz low-frequency attenuation to meet different demands. Standard connector size for easy connection with camera. Shockproof design can reduce the mechanical noise of cameras and other vibration noise. Rugged alloy microphone housing features effective EMI resistance. Powered by 1.5V AA alkaline battery, playtime is up to 100 hours. Low power indicator. Practical pickup sound to be used in photography, interviews and other occasions. Note: One 3.5mm MIC socket and one hot shoe are definitely required of your camera. Please notice the hot shoe before your purchase. Specifications: Transducer principle: Back electret condenser Directivity characteristic: Cardioid Frequency response: 50-16KHz Sensitivity: -32dB±3dB (0dB=1V/Pa at 1KHz) Sensitivity tone up: +10dB Bass filter: 10dB/octave at 60Hz