That's a good question Steve. I too have been wondering about them. I've watched a few videos on youtube & I like the sound it produces. It sounds like two actual deer. Just the same, it's hard to determine what real results are taking place. All these years have been producing results with just two antlers .... not that I've had constant luck, so will it be all the more benificial ?? I'd like to think so, so time will tell.