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Lots of strong points:
Low noise, high fidelity, wide operating voltage, low power dissipation and long transmission distance etc.
The new sound pickup (audio monitor) is the best choose for the TV monitoring and safety system.
Match use with the camera can realize AV synch.
Features:
Adjustable sensitivity low noise mini shape sound audio monitor
Low power dissipation & long distance
Audio monitor - sound pick-up
Specifications:
Audio monitoring range: 5-150 square meter
Range: 10m
Operating voltage: DC5-12V
Current: 10mA
Output level: 0V - 6V
Frequency range: 300-5KHz
Frequency respond: 2.5dB
Output impedance: 600 ohm

Included:
1x Sound Slim Pick-Up Monitor Voice Audio Security