Vortex series

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Vortex series
[[File:File:Official Vortex-R.jpeg|200px]]
Company Whelen Engineering

The Vortex-R Series is a line of electronic sirens produced by Whelen Engineering. It consists of four models, the VORTEXR1, VORTEX2, VORTEX3 and VORTEX4. All of which look identical from the outside.