High performance, Omni-directional, pre-amplified microphone for fixed location security applications. Dual Ethernet jack wall plate features one working Ethernet jack and a microphone in the other. 25’ pickup pattern in all directions. Built in limiter circuit automatically lowers the output level during loud sound intervals. Selectable lo-cut and hi-cut filters significantly reduce background noise. Connects directly to our switcher / mixer / amplifiers or use one of our many interface products to make fast and clean connections to DVRs, IP cameras and remote monitoring equipment.

Features:

• Omni-directional 25’ pickup pattern. One functioning Ethernet jack Low noise MOSFET pre-amplifier.
• 500Hz-16Khz Frequency response.
• Switch selectable hi-cut/low-cut filters limit frequency response to 900-6khz significantly reducing background noise.
• Switch selectable volume range: "Line level" (0db) or "Microphone level" (-30db) 
• Adjustable gain in both volume ranges.
• 100 Ohm unbalanced output. Internal peak limiter circuit (.5 sec response) 3 position terminal block.
• Reverse polarity protected Power: 12 to 24VDC @ 10mA.
• PTCC fused and reverse polarity protected On-board voltage regulator and RFI filtering.
• S/N ratio: more than 60DB
• Sensitivity –45DB
• Industrial temperature range –40 to 85C.
• Dimensions: L 4.5” W 2.7” H 1.8”
• Weight .09lbs

Includes:

• SM1-EJ Surface mount microphone.
• Warning label.
• Installation instructions.

Options:

• See Pre-amplifier board selection guide for alternate pre-amplifier form factors.
• Add –LN to P/N for ultra low noise (80db) and high sensitivity (–28db)
• microphone capsule 

Wiring requirements:

• 2 conductor shielded (with drain wire) 22 gauge stranded. Max cable length 1000’.