Takstar&reg; High Sensitivity EMI Resistance Stereo Shotgun Microphone Mic 1.5V AA alkaline battery-powered, battery life of up to 100 hours Low power indicator, fully prepared ready to replace the battery Use standard universal connector specifications, can be simply fixed the camera Shock-resistant structural design, to reduce the mechanical noise of the camera and other vibration noise Set tone governing the selection of alloy materials design, sturdy solid, and can effectively shield electromagnetic interference