ETS SMI-3 2 SM1 Microphones SMI-2 Interface Box
SKU
SMI-3
Model No
SMI-3
$109.99
Product Highlights
- SM1 Microphone
- Omni-directional Electret element, 25' range in all directions
- Frequency response: 200-16Khz
- Low noise MOSFET pre-amplifier
- Line level, unbalanced output

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The SMI-3 from ETS is a 2 SM1 Microphones and SMI-2 Interface Box, designed specifically for audio surveillance applications. This versatile 2-zone audio surveillance kit seamlessly connects to various recording devices and monitors, enhancing your security and surveillance capabilities through effective audio capture.
ETS SMI-3 + Key Features
- SM1 Microphone: Specifically designed for audio surveillance, ensuring high-quality sound capture in various environments.
- Omni-directional Electret element: Offers a 25' range in all directions, providing comprehensive audio coverage.
- Frequency response: 200-16kHz, ensuring a wide range of audio frequencies are captured accurately.
- Low noise MOSFET pre-amplifier: Reduces background noise for clearer audio recordings.
- Line level, unbalanced output: Compatible with most audio recording devices for easy integration.
- Adjustable gain: Allows for customization based on the environment to optimize sound levels.
- Treble boost circuit: Selectable on/off function enhances clarity of time lapse recordings.
- Limiter circuits: Protect audio quality by preventing distortion, also selectable on/off.
- Flush mountable: Allows installation on a single gang electrical box for a discreet setup.
- Power requirements: 12 VDC @ 10mA for the microphone, ensuring low power consumption.
- SMI16 Interface Adapter: Expands connection options for added flexibility.
- RCA or 3.5mm jacks: Provide convenient connectivity options for DVRs and remote monitoring equipment.
- Euro-style connectors: Ensure fast and clean cable terminations for simplified installation.
- LED power indicator: Provides visual confirmation of power status for added convenience.
- Power requirements: 12 VDC @ 20mA for the interface, ensuring reliable performance.
- Reverse polarity protection and fused: Enhances safety and reliability during operation.
Detailed Specifications for ETS SMI-3
| Feature | Details |
| Type | 2 SM1 Microphones and SMI-2 Interface Box |
| Microphone Range | 25' omni-directional |
| Frequency Response | 200-16kHz |
| Output Type | Line level, unbalanced |
| Power (Microphone) | 12 VDC @ 10mA |
| Power (Interface) | 12 VDC @ 20mA |
| Mounting | Flush mountable on single gang electrical box |
| Connections | RCA or 3.5mm jacks, Euro-style connectors |
| Additional Features | Limiter and treble boost circuits, adjustable gain |
| Safety Features | Reverse polarity protection |
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