Simplex 4903-9417 This is a SmartSync TrueAlert which I am able to use with my Simplex 4010. Brand SimplexModel 4903-9417Manufacturer SimplexType Alarm (Horn/Strobe)
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...