I used it once it caught an annoying jerk across the street starting its lawn mower parking it running right outside my front door then walking and letting it run, do not come back until the gas runs out (6 hours). I couldn't keep track of the desired decibels but I took a picture with my phone for the cops who think I'm overreacting. Tracking obstruction - that's it. The bad news is that I lost it. Good news, I'll buy another one.
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