System Sensor P2R Category : System Sensor The strobe on this unit is broken. Brand System SensorModel P2RManufacturer System SensorType Alarm (Horn/Strobe)
System Sensor SP1W2475ADA Category : System SensorThe strobe portion can detach from the speaker body.
Simplex 636-820 Category : SimplexThis is the Simplex 4010 user interface which was taken out of a broken 4010.
Space Age A32-BL-SFXC-TJ24D-HA24D+HA24D Category : Space Age ElectronicsI’m pretty sure that the horn on this unit is made by Space Age Electronics. Otherwise, it’s probably a Wheelock...