Nighthawk Model 900-0057 direct plug-in Carbon Monoxide Alarm / Detector - Good working condition

- Digital read-out from 0-999 PPM warns of even low carbon monoxide levels
- Updated digital reading every 2-1/2 minutes lets you see if levels change
- Never needs recalibration
- Advanced long-life state-of-the-art sensor
- Peak level memory display shows highest CO reading since unit was last reset

The number one feature that sets Nighthawk apart from other detectors is its unique display that gives you a continuous readout of CO levels from 0-999 parts per million.  The digital display serves as an early warning of CO presence.  Additionally, the digital display gives you added time to find the source of the CO and correct the problem, limiting the risk of unrecognized long term exposure.  Of course, the loud 85 decibel alarm warns of higher levels, even while you're sleeping.

While many other CO detectors require costly sensor or battery pack replacement, there are no replacement parts on Nighthawk CO detectors.

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