About this item ▶【Super Cardioid Condenser Shotgun Mic】Using a super cardioid pattern, this camera mic can effectively eliminate background noise and record the sound accurately and clearly, giving you better recording results. ▶【Long Working Time】: This professional gopro microphone is powered by 1 1.5v AAA detachable battery and can work continuously for up to 70 hours, allowing you to use it indoors or outdoors anytime, anywhere. ▶【Universal Compatibility】: External microphone for camera, camcorder, iPhone, Android phone recorder, tablet and laptop. Can be used as iPhone mic, DSLR mic or camera mic. ▶【Low Noise and High Sensitivity】: The professional video microphones adopt 38 – 20,000 Hz response frequency, sensitivity: -40±3dB, can capture more subtle sounds, built-in high-definition audio analysis chip, providing professional broadcast-quality sound. ▶【BOYA Warranty】 We provide 12-month warranty and lifetime customer service. If you have any questions about BY-BM3011 dslr microphone, please feel free to contact BOYA Support.