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10pcs/lot Sound Monitor Audio Pickup Security Listening for CCTV Camera Audio Camera Microphone Product introduction Product introduction: Concealed miniature high sensitivity high fidelity pickup Monitoring reange:5-80m^2 Micro patch,little noise,high fidelity Working voltage:DC9V-12V Frequency range:200-10kHz Installation position selection You can install pickup on the ceiling or in the side wall hanging. Installation location should be as far as possible from the main areas of
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