This professional closed-circuit audio pickup microphone is designed to provide crystal-clear audio monitoring for your CCTV surveillance system. It perfectly complements your video feed, ensuring you have both sight and sound for a complete security solution. Whether for a home, office, or commercial space, this device delivers reliable and high-quality audio capture. Key Features High Sensitivity: Built-in high-performance microphone precisely captures subtle sounds from the environment. Wide Monitoring Area: Covers a large area from 5 to 150 square meters, making it suitable for various room sizes. Broad Frequency Response: A 200Hz to 10KHz frequency range ensures that both human voices and ambient sounds are clear and distinguishable. Stable and Reliable Performance: Operates on a wide 9V-12V power supply with a low current draw (12-18mA), providing stable and durable performance. Noise Reduction: Features effective noise filtering to deliver clean, crisp audio output. Easy to Install: Simple two-wire connection (Red Line and Black Line) allows for seamless integration with your DVR or surveillance camera. Technical Specifications Power Supply: 9V - 12V Work Current: 12 - 18mA Frequency Response: 200Hz ~ 10KHz Output Level: 0-6Vpp Monitor Area: 5m² ~ 150m² 【Product Applications】 Ideal for use in banks, shops, offices, schools, conference rooms, and homes—any location requiring synchronized audio and video monitoring.