Negative Positive
Title: practical announcement system
Review: Remote sensor is a bit tricky to setup and adjust. Reliability at detecting motion is very good, minimal false signals. (About three months of use). Adjustable indoor volume - and - tone is noteworthy (not abrasive nor harsh). The system certainly has capability for expansion and multiple uses. Moderately expensive, but quality seems justified. Claimed battery life "up to 2 years" (9V rectangular battery) remains untested; I can't imagine it surviving anywhere near that long in a cold climate (I'm in the south). Likewise, a unit exposed to full-weather elements (mine is sheltered). Certainly worth a try considering the limited other systems available. Price seems competitive if not slightly better.
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