This was my second "NEW: system the 1st I returned because you could only have on sensor/alarm sound, and I returned it.This system seems well made.and was easy to set up.1. Plug Alarm Base in.2. Install batteries in the sensor.3. Select the alarm sound you like and hold the "Volume button" until it beeps and flashes and that is it other than mounting it.The booklet/instructions are too small for most to read, but all else was fine and it works as quoted and if it lasts 4 years like my old system, I'll be happy.
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