I disagree about the e caller making the jackrabbit redundant. the E caller seems to have a less than 100% success rate luring bobcats. I've seen one milling about near my stand but not moving to the e caller but after using the jackrabbit caller they immediately trotted over and stood under my stand, not at my caller. Also if you turn the E caller off for some reason there's a cool down time for when it'll attract an animal that was attracted by it when you switched off. So the jackrabbit caller still has a purpose.