Negative Positive
Title: Time Will Tell if a Good Value
Review: Purchased three (3) of the First Alert CO615 Carbon Monoxide units. Units were packaged well and were delivered promptly.All units were delivered with all items described, including the batteries.Assembly and installation was straightforward, per the instructions.While the "test" button does permit one to determine if the alarm sounds, it does not "test" if the unit is capable of correctly detecting carbon monoxide. Also, there is no apparent method to calibrate the unit.
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