System Sensor P2RHK Category : System Sensor This is an outdoor SpectrAlert Advanced. Brand System SensorModel P2RHKManufacturer System SensorType Alarm (Horn/Strobe)
Simplex 4904-9103 Category : SimplexThis is the ceiling-mount version of the Simplex 4904-9101 remote strobe.
Wheelock ET-1080-WS-24 Category : WheelockYou can’t really tell from the pictures, but the strobe is practically falling out of this particular unit.