?This is Spy Mini Microphone CCTV Security RCA Output! It is made of the highest quality cells£¬ it has safety£¬ reliability and efficiency.                                    Features            New Higher S / N ratioGreat for security monitoringSave money and timeOnly one power supply for camera and microphonePlug &amp; playExtremely sensitive                                                            Specifications            Power In    2.1mm female    <br>Power Out    2.1mm male    <br>Range    150 square meters    <br>Audio Output    RCA female    <br>Sensitivity    200mA / ubar    <br>Work Current    5mA - 60mA    <br>Work Voltage    6 - 14 V    <br>Length    55cm    <br>                                                            Package Includes            1 x Mini Microphone CCTV Security RCA Output