| Brand | System Sensor |
|---|---|
| Model | D4120 |
| Type | Smoke Detectors |
| MPN | D4120 |
Check the listing for details. System Sensor D4120 Photoelectric Duct Smoke Detector. Condition: For parts or not working. Listed at 68.99 USD. Looks to be in operational condition, but it’s missing the front cover.
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