Occupies the same space as the HD version. Here's a link that provides more detail.
http://www.hdtimeline.com/touring_models/11540-radio_shack_siren.html
I understand the value of battery back. I also understand that if someone plans on stealing my Ultra by taking the time to remove the seat, cut the battery wires and defeat the fork lock, battery back up probably isn't going to discourage them from stealing it. I have no plans to add a pager however if I did I would spend the $160 for the HD siren and pager.
I really didn't have any intention of adding a siren but a I love a value like the Radio Shack siren. Just my opinion.
P.S. I installed it last summer and it worked great all the way thru November when I put the bike away for the winter.
http://www.hdtimeline.com/touring_models/11540-radio_shack_siren.html
I understand the value of battery back. I also understand that if someone plans on stealing my Ultra by taking the time to remove the seat, cut the battery wires and defeat the fork lock, battery back up probably isn't going to discourage them from stealing it. I have no plans to add a pager however if I did I would spend the $160 for the HD siren and pager.
I really didn't have any intention of adding a siren but a I love a value like the Radio Shack siren. Just my opinion.
P.S. I installed it last summer and it worked great all the way thru November when I put the bike away for the winter.