The Model 2001-130 is the 6th Generation, newest and best performing in the official Model 2001 series of sirens and is the current model of Model 2001 in production as of today. The Model 2001-130 is identical to a Model 2001-SRNB in every way except for it's housing. Rather than using the square housing of the Model 2001-SRN and SRNB, the Model 2001-130's housing is taller and rectangular in shape. This is a correction for a design flaw of previous Model 2001 sirens, where the collector ring a