View 1 of 6pcs------SITERWELL Hardwired Smoke Alarm 120V AC with DC 9V Battery Backup Interconnect Photoelectric Smoke Detectors and Fire Alarm Silence and Fault Warning(GS517)

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View 1 of 6pcs------SITERWELL Hardwired Smoke Alarm 120V AC with DC 9V Battery Backup Interconnect Photoelectric Smoke Detectors and Fire Alarm Silence and Fault Warning(GS517)View 2 of 6pcs------SITERWELL Hardwired Smoke Alarm 120V AC with DC 9V Battery Backup Interconnect Photoelectric Smoke Detectors and Fire Alarm Silence and Fault Warning(GS517)