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 level.
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.)