I have an Extreme Dimensions Wildlife call that was given to me by the owners of the company. I think it comes with 50' of cable, heck they may even be wireless now. Makes just about every call that I bring in my arsenal all in one package. I've never used it, since it's illegal here in PA. The basic concept is being able to set the speaker away from your area where the deer won't pick you out. Makes sense, much like varmint calling.
I've never used it, nor probably will I..but it's a neat concept. I just prefer to bring my own grunt tubes, bleat calls and horns with me. All pack easily in my pack, with exception to my rattlin' horns. I use a pretty big set, but they are strapped to the outside of my pack. I suppose if I was allowed, I'd be apt to try it anyhow. Check out their site...I may have one of the first models for sale

since I have no use for it. I'll bet mine is over 6-7 yrs old, and never really used it! It was when they first were starting the company and were actually an advertiser here. Just one more company Huntchat helped to get their name out there