I have these, AXIL Extreme 2.0. I haven't had the opportunity to get them set and tried (too cold), but I have heard from very good friends that they are awesome! One of them was roughly a half mile from the gate where he was hunting when his girlfriend started a 4 wheeler to come to where he was and it sounded like she was right there close. He is a semi-retired jet mechanic/pilot and is almost deaf! In fact, all but a couple who recommended them are pilots, so I figured if they worked that well for them?? That was good enough for me!