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Adjustable Audio Pickup Microphone Sound Monitor Sensitivity Audio Monitoring For Surveillance Kits
- Adjustable Audio Pickup Microphone Sound Monitor Sensitivity Audio Monitoring For Surveillance Kits.
- Multiple frequency selective inhibition of effective environmental noise, pure tone, dynamic brave.
- Automatic gain control (AGC) circuit.
- Sensitivity can be adjusted.
- Low noise, high fidelity.
- Power polarity protection circuit. Gum design, convenient installation.
- For the school, bank, factories and other environmental synchronous recording project.
USD $9.99
