My youngest son loves to hunt. He's 7 now but last season he wanted to go every day on our farm. This put me in a pickle because our 2 man ladder stand needed some type East wind.
I bought the HR500 package deal they had going last year hoping it would help when we didn't have the perfect wind we needed.
What I observed was that it did work but....
Deer do smell the ozone. Some deer reacted to it and some didn't. The deer that reacted didn't bug out but more of an alert trying to figure out what the smell was all about. They would kind of lock up and stall like they were waiting to see something that's making the smell.
I also saw deer going about their travels, even get downwind like we weren't there.
My son shot a buck with his crossbow and we hunted with the Ozonics a few more times but I could tell that the deer started associating the ozone smell to us hunting them.
The point I'm trying to make is I believe that Ozonics works best if you're hunting big woods or different areas all the time because basically you're bringing in a foreign smell to the woods. They may not smell you but basically you're turning human odor into ozone and that has the potential to equal danger to a deer.