System Sensor SR Category : System Sensor This unit is exactly the same as my other System Sensor SR. Brand System SensorModel SRManufacturer System SensorType Alarm (Remote Strobe)
Honeywell S465B Category : HoneywellThis is essentially a slightly modified-looking version of the Honyewell S464A with a two-stage option.
Simplex 2901-9333 Category : SimplexThis bell is compatible with some of Simplex’s strobe plates, such as the Simplex 4904-9139.