Later in the day I was diving down without a tank. Whilst retrieving a fish that had fallen off a spear, I came into a collision with another Bull Shark chasing the same fish – needless to say it broke off the charge again. So your product works!! And might I say it was easy to use, in fact I was not overly aware of its presence even though the sharks were! I have friends that swim with the Ocean Guardian and others who use it at my surf club on their surf skis, so it obviously brings others peace of mind as well.
So more power to you and good luck with Ocean Guardian.