Thunderbolt
The Thunderbolt siren was a supercharged electromechanical siren produced by Federal Electric, which later became known as Federal Sign & Signal and Federal Signal.
Thunderbolt 1000
The Thunderbolt 1000 is a Single-tone supercharged siren that is part of the Thunderbolt Siren series. The Thunderbolt 1000 has a chopper that contains 5 ports.
Thunderbolt 1000T
Thunderbolt 1003
The Thunderbolt 1003 uses two solenoids that are attached to the upper portion of the siren to create a third, high-low signal, which can be used as a fire signal.