Notice: The microphone is very sensitive; avoid dropping, knocking, or subjecting it to strong shock. If the microphone is placed near the speaker, feedback may occur. To prevent this, position the microphone away from the speaker or reduce the speaker volume. Changing the pickup mode switch settings may produce noise. The battery indicator on the microphone lights up briefly when powered on and then turns off automatically to conserve battery power and prevent interference with video recording. Please check the switch to confirm it is properly activated. Turn off the microphone when not in use. With sufficient battery power, the indicator flashes once when the power switch is turned on. During use, if the power light illuminates steadily, this indicates low battery. The microphone can still operate for one to two hours under these conditions, but you should replace the battery promptly. Product Name: Microphone For Camera Model: MIC-01 Cable Length: Approximately 20 cm Frequency Response: 3015,000 Hz Sensitivity: -40 dB (0 dB = 1 V/Pa at 1 kHz) Polar Pattern: Single Directional x 2 Output Impedance: 200 Ohm Signal-to-Noise Ratio: 76 dB (1 kHz at 1 Pa) Maximum Sound Pressure Level: 120 dB at 1 kHz (harmonic distortion of 1% or less) Power Supply: 3V DC Type: MS (Mid-Side) Stereo Wired Power Requirement: 3V CR2 battery Battery Life: Approximately 800 hours (at room temperature, using included 3V CR2 lithium battery) Compatible Model: Compatible with any DSLR camera equipped with a 3.5mm microphone input and standard hot shoe mount How To Use: 1. Slide the adapter onto the cameras hot shoe to securely mount the microphone. 2. Ensure the camera is powered off before connecting the microphone. Insert the L-shaped mini stereo plug into the cameras microphone input port. Dimensions: 132 x 30.5 x 61 mm Material: ABS Color: Black Package Contents: 1 x Microphone (camera not included, shown for illustration only) 1 x Battery 1 x User Manual Note: Light and display differences may cause slight color variations between the product image and actual item. Measurement error allowance is +/- 13 cm.