Photo 1 of Firex Smoke Detector, Hardwired with Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-Pack

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Photo 1 of Firex Smoke Detector, Hardwired with Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-PackPhoto 2 of Firex Smoke Detector, Hardwired with Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-PackPhoto 3 of Firex Smoke Detector, Hardwired with Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-PackPhoto 4 of Firex Smoke Detector, Hardwired with Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-Pack