Originally Posted by
Chuck Naill
I've been looking at this horn. Anyone have experience with this horn as a dog deterrent?
Works mostly by surprising dogs so that they break stride. Scares smaller dogs and works great to clear squirells.
Originally Posted by
Jim from Boston
Thanks for the comments. I've always wondered how quickly one could react to activate, meanwhile braking as well. I'm unclear though as to where the "bottle" (air reservoir) is carried on the bike. Water bottle cage I presume, though from pictures I've seen the connecting hose looks short.

I put the bottles under the top tube.
On the black bike you can see the white button on the lower handlebar...when I'm on the hoods (most of the time) it is under my left pinkie.
The black bike has the newer metal cannister which works well in the winter. The other two bikes have the older (but lighter) plastic bottle.