Asked a question about the sirens for the smart security systems if they were all the same except for the ones with the pager.Didn't seem to be an answer so I went ahead and bought one for a 2002 soft tail for a 2010 dyna. Plug was the same as most of the I looked at, 3 wires correct shape and it worked. For what it's worth I guessing the sirens are all the same for all models except for mounting hardware.