ITEM NAME:Microphone 3.5mm Digital Video Recording Interview Hifi HD Sound Mini Mic P Y9B3 Microphone 3.5mm Digital Video Recording Interview Hifi HD Sound Mini Mic P Y9B3 Transducer: Condenser Microphone Communication: Wired Style: Hanging Microphones Polar Patterns: Hypercardioid Use: Conference Microphone Set Type: Single Microphone Model Number: MIC-06 Single: Classical condenser head Channel: mono Frequency response: 50Hz-16kHz Sensitivity enhancement: 20dB+-2dB Equivalent noise level: 23dB A Directivity: Hypercardioid Output impedance: 200 ohm + -30% Maximum sound pressure level: 130dB (THD Less than =1.5% at 1KHz) Sensitivity: -45dB+-3dB (0dB=1V/Pa at 1kHz) Voltage: AAA,1.5V Size: 138x60mm Usage: Attachment will slide adapter to connect to the camera fixed on the slide rail microphone. After confirm the camera closed, connected to the microphone L mini stereo plug the camera microphone input port. Notice: If the microphone is placed next to the speaker, it may produce whistlers. If happened, please keep the microphone far away from the speaker, or reduce the volume of the speaker. The tape change pick up mode switch settings can produce noise. The battery indicator on the microphone. When opening the lights up and immediately go out to save battery power and prevent stray light effects shooting video. So please check the switch to confirm that the switch has been closed when you do not use it. This is the normal