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Dahua DHI ARA12 W2 Alarm Wireless Indoor Siren 9U the 6MP may serve you 4MP the 6MP may serve you better Combines adjustable column mounting optics with sturdy IK10 physical protection Confirm Sound Output Before Relying on It: Sources disagree meaningfully on rated sound output — Dahua's own datasheet states ≥105dB at 1m Because it's wireless
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