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![Photoelectric Smoke Alarm AC power DC battery backup Wholesale retail Smoke Alarm Fire Security System [DG-321] - $9.00 : China top brand burglar and fire alarm systems, New technology burglar and fire](https://vedardalarm.com/images/alarm_sensor/DG321_L.jpg "Photoelectric Smoke Alarm AC power DC battery backup Wholesale retail Smoke Alarm Fire Security System [DG-321] - $9.00 : China top brand burglar and fire alarm systems, New technology burglar and fire")
Photoelectric Smoke Alarm AC power DC battery backup Wholesale retail Smoke Alarm Fire Security System [DG-321] - $9.00 : China top brand burglar and fire alarm systems, New technology burglar and fire
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