CCTV Microphone Noise Reduction Audio Monitor for Security System Acoustic Sound Monitor Built-in Imported Chips High Sensitivi Description 1. Using split block design easy to install and demount. 2. Built-in Imported chips, high sensitivity, beauty voice. 3. Integrated import front audio amplifier, microphone can drive directly Active speaker, DVR and recorder. 4. Using echo eliminate technology, effectively reduce the echo. 5. Suit for place such as police, court, meeting room. Interrogation room, bank, etc. Parameter 1. Monitoring range: 10-100sqm (adjustable) 2. Working voltage: 12 V DC regulated power 3. Supply current: 20mA 4. Transmission distance: up to 3000meters 5. Sensitivity Reduction: -35db 6. Signal Noise Ratio: 70db 7. Frequency response: 20hz to 20KHz 8. Connecting way: red line--power, black line - ground wires, white line -- audio. 9. Weight: 75g (Size: 80mm*80mm*27mm) Details Images Packing Package Included: 1 x microphone, 1 x user manul, 1 x bag This product can be custom made. Please contact us for details requirement.