I bought a pair of them 2 years ago! They do work well! one of the first times I used them it was one of those days where everything is just so still and there wasn’t a sound to be heard in the woods! with them in I couldn’t hear anything so I kept turning up the volume! finally I started to hear something and it sounded like a turkey or deer coming threw the woods! only thing was it was coming from directly below me! I stared at the ground where it was coming from! after a minute or 2 of looking I seen a beetle walking across a leaf! that is what I was hearing! you wont believe how well they work!
The down side of them! on windy days or if it is raining a little and I don’t mean really windy or hard rain! It amplifies the sound of the wind and rain! and you sit and listen to what sounds like your in a wind storm!
I’ve started useing mine only on less windy days! and I love them!
Days when it is quiet and the woods are damp so deer can walk so quietly! They really do what they are meant to! you will hear them deer sneaking up on ya!