Feature: Top mounting Audio Monitor ,Audio Head,Sound Pickup. Processing Chip: High quality audio digital analog processor, high fidelity, sensitivity adjustable Product. Use the high fidelity digital processing chip, amplify the audio signal via the code and decode technology. It can eliminate the background noise and high frequency interfered voice efficiently. It's electrical noise dynamic closed loop restrained circuit which and eliminate the noise completely. Echo reentrant eliminate which can reduce the serious echo in the void rooms. Perfect voice. Pure tamber, strong dynamic, built-in AGC circuit. Lots of strong points: low noise, high fidelity,wide operating voltage, low power dissipation and long transmission distance etc. the sound pickup (audiomonitor ) is the best choose for the TV monitoring and safety system. Match use with the camera can realize AV synch. Match use with Audio Monitor: 1.DVR: insert card type or embedded, connect with the audio directly. 2.Connect with the audio matrix, long delay recode, recorder and professional monitor directly. 3.DVS, digital optic fiber transmission, UTP transmission, connect with the audio directly. 4.Other equipments with audio input. Can compatible with various surveillance board card, no cross talk between different channels. No need to use audio adapter when matching use with the above equipment Audio Monitor Application: Applied to all the voice monitoring place such as bank, school, prison, hospital, marketplace, factory and meeting system. Specifications: 1 Audio monitoring range:5-150 square meter 2 Operating voltage: 6V-12V DC 3 Current: 20mA 4 Output level: 0-6V 5 Frequency range: 300-5kHz 6 Frequency respond: 2.5dB 7 Output impedance: 600Ω 8 External dimension: D=67mm H=35mm 9 Monitori