System Sensor COSMO-4W SF 25/11 Simplex TrueAlert 4906-9251 is a

Simplex TrueAlert 4906-9251 is a Multi-Tapped Speaker with Multi-Candela Addressable Strobe

Three screw-in NPT plugs with O-ring gaskets for a watertight seal is included with each back box

Floor and wall mounted styles

The Intelligent photoelectric smoke sensor utilizes a unique optical sensing chamber that is designed to sense smoke produced by a wide range of combustion sources

System Sensor COSMO-4W SF 25/11 Simplex TrueAlert 4906-9251 is aThe i4 Interface Module connects up to 12 detectors to a wide range of control panels using only 2 to 3 zones. It also interconnects the devices, so when one device alarms, they all sound. The i4 module allows up to 12 i4 Series or compatible i 3 Series smoke detector models to be integrated into a fire alarm panel using only 2 to 3 zones: a smoke zone, a CO zone and an optional trouble zone. Detectors sound Temp 3 for smoke and Temp 4 for CO events.