Info is found here as well as a new pic:
http://www.federalsignal-indust.com/def ... ookup=2387
Here is the pic of the Federal Signal 2001-130:

The Federal Signal Model 2001-130 is a unique innovation in the high power outdoor warning siren market. The patented design represents a new generation of rotating, uni?directional electromechanical sirens.
The 2001-130 can be operated with a 120VAC battery?backup control cabinet or a 240VAC/VDC control cabinet.
This siren can be controlled remotely via wire or radio with the Model FC controller. The Model 2001-130 produces three distinctly different tones ? Wail, Fast Wail and Steady. The high decibel output provides for maximum coverage from a single siren site.
Federal Signal's Model 2001-130 produces 130dBc at 100 feet. Its ring radiator projects a 60? beam of sound which rotates at two RPM and is adjustable to six RPM. The design allows for small size without compromising sound output, and minimizes wind loading.
The Model 2001-130 is ideally suited for wide area coverage with high decibel output and attention getting signals. The Model 2001-130 also overcomes high ambient noise areas, such as those found in industrial plants, steel mills, chemical plants and refineries.