Title: Worry Free for the Last 9 years
Product review: I purchased this unit in November 2002. Tested each year and was always in operational order. Replacement of the internal backup battery was done when alerted to do so. Today, the alarm with Err code displayed, and a quick review of the manual (searched using Google) indicated a component error. Time to replace the unit. I will happily do so with the same unit. I definitely received piece-of-mind and my money's worth these past 9 years.
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