I agree with the previous review. You need to put these on at least a light action rod. If you put them on an ultra lite, the bite sensor is too heavy for the rod tip. They are super sensitve and sense negative bites as indicated. They also work best in a shack or on nice days so they do not freeze up. I hook most of my fish before I feel a bite.
I have had the chance to field test one of these last season and find that they are a little on the large size and work the best on thicker diameter rods. they are too large to work on panfish rods. the concept and idea are good but the size needs to be reduced.