Highest performance, Omni-directional, pre-amplified microphone for fixed location security applications. Features include

Features:

• Adjustable high and low frequency cut off filters. Useful for reducing background noise
• Adjustable automatic level control with a compression ratio range of 1:1 to 10:1. The circuit automatically lowers the gain in loud environments and when quiet, raises the gain where faint audio sources such as people whispering can then be heard.
• Omni-directional 25' pickup pattern
• Low noise MOSFET pre-amplifier.
• 500Hz-16Khz Frequency response
  (hi-cut and lo-cut off)
• Adjustable lo-cut filter: (500hz to 1Khz)
• Adjustable hi-cut filter: (5Khz to16Kz)
• Adjustable automatic gain control.
  (compression range 1:1-10:1).
• Switch selectable volume range: "Line level" (0db) or "Microphone level" (-30db)
• Adjustable output level (post AGC).
• 100 Ohm unbalanced output.
• Treble boost pre-emphasis.
• S/N ratio: more than 60DB (80db –LN option)
• Sensitivity –45DB (-28db –LN option)
• 3 position terminal block.
• Power: 12-24Vdc
• PTCC fused and reverse polarity protected
• On-board voltage regulators
• and RFI filtering.
• Flexible ABS plastic plate mounts flush or on a
  single gang electrical box.
• Temperature range: -40 to 85C.
• Dimensions: L 4.7” x W 2.9” H 0.9”
• Weight .04lbs

Includes:

• Mounting screws.
• Warning label.
• Installation instructions.