1. This security microphone for CCTV security camera is compatible with devices that accept AV input, like DVR, VCR, TV, etc.
2. Used to increase a microphone's low output voltage to a stronger usable .
3. High Sensitivity Audio Sound Pick Up. Sensitivity adjustable.
4. Low noise, high-fidelity.
5. Wide monitoring range of about 10-50 square meter.

Spec:
Features:
This security microphone for CCTV security camera is compatible with devices that accept AV input, like DVR, VCR, TV, etc.
Used to increase a microphone's low output voltage to a stronger usable .
High Sensitivity Audio Sound Pick Up.
Sensitivity adjustable.
Low noise, high-fidelity.
Wide monitoring range of about 10-50 square meter.
Specifications:
Color: Black
Material: Plastic
Voltage: DC 9-12V
Current: 15mA
Output Impedance: 600ohm
Monitoring Range: 10-50 Square Meter
Connector: Red (DC12V Input), Black (DC12V Output), White ()
Cable Length: About 42cm
Package Weight: About 29g
Package List:
1 * Audio Pickup Device (Other items in the pictures are not included.)