Fire Alarm Annunciator YFR-S3 Steel Cabinet YFR-S3 Addressable 1 Loop Fire Alarm Annunciator Steel Cabinet (256ADD) YFR-S3 Addressable 2 Loops Fire Alarm Annunciator Steel Cabinet (512ADD) YFR-S3 Addressable 3 Loops Fire Alarm Annunciator Steel Cabinet (768ADD) YFR-S3 Addressable 4 Loops Fire Alarm Annunciator Steel Cabinet (1024ADD) YFR-S3 Addressable 5 Loops Fire Alarm Annunciator Steel Cabinet (1280ADD) YFR-S3 Addressable 6 Loops Fire Alarm Annunciator Steel Cabinet (1536ADD) YFR-S3 Addressable 7 Loops Fire Alarm Annunciator Steel Cabinet (1792ADD) YFR-S3 Addressable 8 Loops Fire Alarm Annunciator Steel Cabinet (2048ADD)